Reproduction system

Abstract

To achieve higher acoustic performance.SOLUTION: The first sound output unit of the display device and the second sound output unit of the reproduction device output the sounds on the basis of the sound signal of the center channel of the content, and the first sound output unit outputs the high-frequency sound included in the sound of the content by vibrating the component related to the display unit, the second sound output unit outputs, from a speaker corresponding to a center channel, a sound in a mid-range and a low-range that are lower than the high-range, and the reproduction system complements and outputs the low-range whose reproduction is limited by the sound output by the vibration of the component in the first sound output unit. The present disclosure can be applied to, for example, an AV system including a television receiver and an audio device.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a playback system, and more particularly to a playback system that is capable of achieving higher acoustic performance. [Background technology]

[0002] 2. Description of the Related Art AV (Audio Visual) systems that enable viewers to enjoy content such as television programs and movies with more realistic sound have become widespread.

[0003] Patent Document 1 discloses a speaker device for a television receiver that performs surround playback without placing a center speaker in the center of the AV system. Patent Document 2 discloses a multi-channel audio playback device that places a speaker that exclusively plays back the high-frequency components of an audio signal in a position different from the other speakers and approximately in the center of the display, so that the sound image of the reproduced audio is localized approximately in the center of the display to match the video. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-247890 [Patent Document 2] Japanese Patent Application Publication No. 5-300596 Summary of the Invention [Problem to be solved by the invention]

[0005] In AV systems consisting of a television set and audio equipment, there are acoustic limitations when it comes to positioning sound images within the screen on which the video is displayed, so higher acoustic performance is required.

[0006] The present disclosure has been made in light of these circumstances, and aims to make it possible to achieve higher acoustic performance. [Means for solving the problem]

[0007] A playback system according to one aspect of the present disclosure is a playback system comprising a display device and a playback device, wherein the display device comprises a display unit that displays video of the content and a first sound output unit that outputs the sound of the content so that a sound image is positioned on the screen of the display unit, and the playback device comprises a processing unit that processes the sound signal of the content and a second sound output unit that outputs the sound of the content, wherein the first sound output unit and the second sound output unit output sound based on the sound signal of a center channel of the content, the first sound output unit outputs high-frequency sounds contained in the sound of the content by vibrating components related to the display unit, and the second sound output unit outputs mid- and low-frequency sounds, which are lower than the high-frequency range, from a speaker corresponding to the center channel, and the second sound output unit complements and outputs the low-frequency range, which is limited to be reproduced by the sound output by vibrating the components in the first sound output unit.

[0008] A playback system according to one aspect of the present disclosure includes a display device including a display unit that displays video of content and a first sound output unit that outputs sound of the content so that a sound image is localized on the screen of the display unit, a processing unit that processes sound signals of the content, and a second sound output unit that outputs the sound of the content. The first sound output unit and the second sound output unit output sound based on a sound signal of a center channel of the content, the first sound output unit outputs high-frequency sounds included in the sound of the content by vibrating components related to the display unit, and the second sound output unit outputs mid- and low-frequency sounds, which are lower than the high-frequency sounds, from a speaker corresponding to the center channel. The playback system complements and outputs low-frequency sounds, which are limited in reproduction by the sound output by the first sound output unit due to the vibration of the components.

[0009] A display device according to one aspect of the present disclosure comprises a display unit that displays video of content, and a first sound output unit that outputs the sound of the content so that a sound image is positioned within the screen of the display unit, and the first sound output unit works in conjunction with a second sound output unit provided in a playback device to vibrate components related to the display unit based on a sound signal of a center channel of the content, thereby outputting high-frequency sounds contained in the sound of the content.

[0010] In a display device according to one aspect of the present disclosure, a first sound output unit outputs the sound of the content so that a sound image is positioned within the screen of a display unit that displays the image of the content, and in cooperation with a second sound output unit provided in a playback device, vibrates components associated with the display unit based on the sound signal of the center channel of the content, thereby outputting high-frequency sounds contained in the sound of the content.

[0011] A playback device according to one aspect of the present disclosure includes a processing unit that processes sound signals of content, and a second sound output unit that outputs sound based on the sound signals of the content, wherein the second sound output unit outputs mid-range and low-range sounds contained in the sound of the content in cooperation with a first sound output unit that vibrates components associated with a display unit provided in a display device so that a sound image is localized within the screen of the display unit based on the sound signals of the center channel of the content.

[0012] In a playback device according to one aspect of the present disclosure, a second sound output unit that outputs sound based on the sound signal of the content outputs mid-range and low-range sounds contained in the sound of the content in cooperation with a first sound output unit that vibrates components related to the display unit provided in the display device so that a sound image is localized within the screen of the display unit based on the sound signal of the center channel of the content.

[0013] The display device and playback device according to one aspect of the present disclosure may be independent devices, or may be internal blocks constituting a single device. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a diagram illustrating an overview of a playback system to which the present disclosure is applied. [Figure 2] FIG. 1 is a diagram showing a first example of sound reproduction in a television receiver. [Figure 3] FIG. 10 is a diagram showing a second example of sound reproduction in a television receiver. [Figure 4] 1 is a block diagram showing a first example of the configuration of a playback system to which the present disclosure is applied. [Figure 5] FIG. 10 is a block diagram showing a second example of the configuration of a playback system to which the present disclosure is applied. [Figure 6] FIG. 10 is a diagram illustrating the relationship between frequency and sound pressure for high-frequency components and mid-low frequency components. [Figure 7] FIG. 10 is a block diagram showing a third example of the configuration of a playback system to which the present disclosure is applied. [Figure 8] FIG. 10 is a block diagram showing a fourth example of the configuration of a playback system to which the present disclosure is applied. [Figure 9] FIG. 1 is a diagram showing a first example of the arrangement of devices constituting a playback system to which the present disclosure is applied. [Figure 10] FIG. 1 is a diagram showing a first example of the arrangement of devices constituting a playback system to which the present disclosure is applied. [Figure 11] FIG. 10 is a diagram showing a second example of the arrangement of devices constituting a playback system to which the present disclosure is applied. [Figure 12] FIG. 10 is a diagram showing a third example of the arrangement of devices constituting a playback system to which the present disclosure is applied. [Figure 13] 10A and 10B are diagrams illustrating examples of notifications according to the connection state of a cable. [Figure 14] FIG. 1 is a block diagram illustrating an example of a configuration of a computer. DETAILED DESCRIPTION OF THE INVENTION

[0015] 1. Embodiments of the Present Disclosure

[0016] (System Overview) FIG. 1 is a diagram illustrating an overview of a playback system to which the present disclosure is applied.

[0017] 1, an AV system 1 is an example of a playback system that plays back video and audio content. The AV system 1 is composed of a television receiver 10 and an audio device 20. The television receiver 10 and the audio device 20 are connected via a cable or the like that complies with a predetermined standard.

[0018] The television receiver 10 plays and displays the video of the content, and also plays and outputs the sound of the content. The audio device 20 has multiple speakers such as a front channel and a center channel, and plays and outputs the sound of the content in cooperation with the television receiver 10.

[0019] In the television receiver 10, the positions of the video and sound of the content can be matched, and the sound image can be localized within the screen on which the video is displayed. In the television receiver 10, the method of in-plane localization for localizing the sound image within the screen varies depending on the type of display panel, etc. Figures 2 and 3 show examples of in-plane localization methods.

[0020] 2, television receiver 10 has liquid crystal display unit 101. In television receiver 10 of Fig. 2, a bezel provided around the screen of liquid crystal display unit 101 is vibrated by actuators 111 and 112 to play back the sound of the content, thereby localizing a sound image within the screen. In addition, television receiver 10 of Fig. 2 can play back the sound of the content through speakers 113 and 114 arranged downward at the bottom of the back of the television receiver.

[0021] 3, television receiver 10 has an organic EL (Electro Luminescence) display unit 121. In television receiver 10 of FIG. 3, the screen of organic EL display unit 121 is vibrated by actuators 131 and 132 arranged on the rear surface to play back the sound of the content, thereby localizing a sound image within the screen. In addition, television receiver 10 of FIG. 3 can play back the sound of the content through speakers 133 and 134 arranged at the bottom of the rear surface.

[0022] 1, the television receiver 10 reproduces and outputs a sound (center sound) corresponding to the sound signal of the center channel of the content so that the sound image is localized within the screen on which the video of the content is displayed. Also, the audio device 20 cooperates with the television receiver 10 to reproduce and output a sound (center sound) corresponding to the sound signal of the center channel of the content from the center channel speaker.

[0023] In this way, in the AV system 1, the television receiver 10 and the audio equipment 20 work together to simultaneously play back sound (center sound) corresponding to the sound signal of the center channel, thereby aligning the positions of the video and sound of the content.

[0024] Here, in content that includes video and sound, by matching the positions of the video and sound and localizing the sound image within the screen on which the video is displayed, the user can experience the sound integrated with the video in a more realistic way.

[0025] In a typical AV system, the center channel speaker (center speaker) is placed near the television set, but because it is located either below or above the television set, the positions of the image and sound do not completely match. For example, in AV systems with separate speakers or speakers known as sound bars, the center channel speaker is placed near the television set.

[0026] Specifically, in an AV system with separate speakers, a center channel speaker is placed near the TV set and multi-channel speakers are placed around the user.A sound bar is a speaker with a built-in multi-channel speaker and AV amplifier in a rod-shaped housing, and is installed near the TV set.

[0027] In recent years, the screen size of television sets has rapidly increased, and the larger the screen size, the more of a problem there is with misalignment between the image and sound. However, due to speaker layout restrictions, television sets often have downward-facing speakers located at the bottom of the back.

[0028] Furthermore, in television sets, in order to synchronize the image and sound, the sound image is localized within the screen by vibrating the bezel around the screen when an LCD display is used, or by directly vibrating the screen when an OLED display is used, as shown in Figures 2 and 3. However, these in-plane localization methods impose acoustically strict conditions on the reproduction of sound by speakers, with limitations on the ability to reproduce low frequencies and acoustic performance such as frequency response and distortion rate being worse than that of audio equipment.

[0029] 1, the television receiver 10 and audio device 20 work together (in other words, by coordinating the playback sounds of the speakers) to simultaneously play back a sound (center sound) corresponding to the center channel sound signal, thereby matching the positions of the video and sound and localizing the sound image within the screen. This makes it possible to achieve higher acoustic performance (frequency characteristics, distortion rate, etc.) than a typical AV system.

[0030] (System configuration example) FIG. 4 is a block diagram showing a first example of the configuration of a playback system to which the present disclosure is applied.

[0031] 4, the television receiver 10 and the audio device 20 are connected via a transmission cable 31 and a center speaker cable 32. The transmission cable 31 is a cable that complies with a communication standard such as HDMI (registered trademark) (High Definition Multimedia Interface). The center speaker cable 32 is a cable for transmitting a center channel audio signal.

[0032] The television receiver 10 has terminals 161 to 163. The audio device 20 has terminals 261 and 262. In the television receiver 10 and the audio device 20, a transmission cable 31 is connected to the terminals 161 and 261, and a center speaker cable 32 is connected to the terminals 163 and 262.

[0033] 4, the television receiver 10 includes an input unit 151, a calculation unit 152, a calculation unit 153, a display unit 154, a sound output unit 155, a synthesis unit 156, an AD converter 157, and a selector 158.

[0034] The input unit 151 supplies the video signal and audio signal of the content input thereto to the calculation unit 152. The input unit 151 is configured as, for example, a tuner. When configured as a tuner, the input unit 151 performs processing such as demodulation on a broadcast signal received via an antenna (not shown), and supplies the resulting video signal and audio signal to the calculation unit 152.

[0035] The broadcast signal transmits broadcast content (for example, a television program) that is transmitted in accordance with a predetermined broadcasting method such as terrestrial broadcasting, satellite broadcasting, cable television broadcasting, etc. Note that the input unit 151 is not limited to a tuner, and may be configured as a communication module, a predetermined input interface, or the like.

[0036] For example, when the input unit 151 is configured as a communication module, it receives a signal of communication content (e.g., video) distributed by a video distribution service (e.g., an OTT (Over The Top) service) via a communication network such as the Internet, and supplies it to the calculation unit 152.

[0037] Furthermore, when the input unit 151 is configured as an interface conforming to a predetermined standard such as HDMI (registered trademark) or USB (Universal Serial Bus), it supplies signals such as recorded content recorded by a recording device (recording / playback device) or network storage, game content played by a game console, and recorded content recorded on a recording medium such as an optical disc or semiconductor memory to the calculation unit 152.

[0038] The arithmetic unit 152 is configured by a processor such as an SoC (System on a Chip) or a CPU (Central Processing Unit), etc. The arithmetic unit 152 performs predetermined arithmetic processing based on signals input thereto.

[0039] The calculation unit 152 performs processing such as decoding on the video signal of the content supplied from the input unit 151, and supplies the resulting video signal to the calculation unit 153. In addition, the calculation unit 152 outputs the audio signal of the content supplied from the input unit 151 to the audio device 20 via the transmission cable 31.

[0040] The arithmetic unit 153 is configured by an integrated circuit such as an LSI (Large Scale Integration), a dedicated processor, etc. The arithmetic unit 153 performs predetermined arithmetic processing based on the signals input thereto.

[0041] The calculation unit 153 displays the video of the content on the display unit 154 based on the video signal supplied from the calculation unit 152. For example, the display unit 154 is configured as the liquid crystal display unit 101 (FIG. 2) or the organic EL display unit 121 (FIG. 3).

[0042] Furthermore, the calculation unit 153 outputs (plays) the sound of the content from the sound output unit 155 based on the sound signal supplied from the selector 158. The sound output unit 155 is a speaker that plays and outputs the sound according to the sound signal of the content.

[0043] For example, when display unit 154 is liquid crystal display unit 101 (FIG. 2), sound output unit 155 is configured as actuators 111 and 112 (FIG. 2) that vibrate a bezel provided around the screen of liquid crystal display unit 101. When display unit 154 is organic EL display unit 121 (FIG. 3), sound output unit 155 is configured as actuators 131 and 132 (FIG. 3) that vibrate the screen of organic EL display unit 121 from the rear side.

[0044] The selector 158, under the control of the calculation unit 153, selects either the sound signal supplied from the calculation unit 152 or the sound signal supplied from the AD converter 157, and supplies the selected signal to the calculation unit 153. The sound signal to be selected in the subsequent stage is a center signal input from the audio device 20 via the center speaker cable 32, and is a center signal converted from an analog signal to a digital signal by the AD converter 157. The sound output unit 155 reproduces and outputs a sound (center sound) corresponding to the center signal from the calculation unit 153.

[0045] The center signal is a sound signal of the center channel. In the following description, of the sound signals, the sound signal of the center channel will be referred to as the center signal, and the sound signals of the other channels excluding the center channel will be referred to as the other channel signals. Note that the center signal supplied to the AD converter 157 is synthesized (added) with a predetermined signal by the synthesis unit 156 as necessary.

[0046] The calculation unit 152 can supply parameters related to the speakers of the television receiver 10 (for example, setting information such as a speaker mode) to the calculation unit 153. The calculation unit 153 switches the sound signal to be selected by the selector 158 based on the parameters from the calculation unit 152. For example, when the selector 158 selects the sound signal to be selected in the previous stage (the sound signal supplied from the calculation unit 152), the calculation unit 152 performs processing such as decoding on the sound signal supplied from the input unit 151, and supplies the resulting sound signal to the selector 158.

[0047] 4, the audio device 20 includes a decoder 251, a distributor 252, a sound output unit 253, and a sound output unit 254.

[0048] The decoder 251 is supplied with an audio signal of the content input from the television receiver 10 via the transmission cable 31. The decoder 251 decodes the audio signal of the content input thereto, supplies the resulting center signal to the distribution unit 252, and supplies other channel signals to the audio output unit 254.

[0049] The distribution unit 252 distributes the center signal supplied from the decoder 251 and supplies it to the sound output unit 253 , and also outputs it to the television receiver 10 via the center speaker cable 32 .

[0050] The sound output unit 253 is a center channel speaker (center speaker) that reproduces and outputs sound corresponding to the center signal. The sound output unit 253 reproduces and outputs sound (center sound) corresponding to the center signal supplied from the distribution unit 252.

[0051] The sound output unit 254 is a speaker of other channels (speakers of other channels excluding the center channel) that reproduces and outputs sounds corresponding to other channel signals. The sound output unit 254 reproduces and outputs sounds corresponding to other channel signals (other channel sounds) supplied from the decoder 251.

[0052] In addition, the calculation unit 152 of the television receiver 10 notifies the audio equipment 20 of parameters related to the speakers of the television receiver 10 (for example, setting information such as speaker mode) via the transmission cable 31, so that the audio equipment 20 can recognize that it should output a center signal for in-plane localization to the television receiver 10.

[0053] In the television receiver 10 and audio device 20 configured as described above, the playback sounds from the speakers are linked to simultaneously play back a sound (center sound) corresponding to a center signal, thereby matching the positions of the video and the playback sound and localizing the sound image within the screen.

[0054] 4 shows a configuration in which the television receiver 10 and the audio device 20 are connected via a transmission cable 31 and a center speaker cable 32, but the connection method is not limited to this. For example, in addition to transmitting video signals and audio signals as digital signals using a cable conforming to a communication standard such as HDMI (registered trademark), transmission using analog signals or transmission using both digital and analog signals may also be performed.

[0055] Alternatively, the television set 10 and the audio device 20 may exchange signals not only by wired communication using a cable but also by wireless communication conforming to a predetermined communication method. Note that the transmission cable 31 and the center speaker cable 32 may be combined into a single cable, and the television set 10 and the audio device 20 may be connected by this cable.

[0056] (Second example) FIG. 5 is a block diagram showing a second example of the configuration of a playback system to which the present disclosure is applied.

[0057] In the configuration shown in Fig. 5, parts corresponding to those in the configuration shown in Fig. 4 are assigned the same reference numerals, and descriptions thereof will be omitted where appropriate. That is, in Fig. 5, the television receiver 10 has the same configuration as in Fig. 4, but in the audio device 20, compared to the configuration in Fig. 4, the decoder 251, the distribution unit 252, and the sound output unit 254 have been removed, and a calculation unit 271 has been newly provided.

[0058] The calculation unit 271 is configured by, for example, an integrated circuit such as an LSI, a dedicated processor, etc. The calculation unit 271 performs processing such as decoding and signal processing on the sound signal input from the television receiver 10 via the transmission cable 31.

[0059] The signal processing for the sound signal involves extracting high frequency components and low mid frequency components from the center signal contained in the sound signal. The high frequency component signal obtained as a result of this signal processing is output to the television receiver 10 via the center speaker cable 32, and the low mid frequency component signal is supplied to the sound output unit 253.

[0060] In addition, the calculation unit 152 of the television receiver 10 notifies the audio device 20 of parameters related to the speakers of the television receiver 10 (e.g., information related to frequency characteristics) via the transmission cable 31, so that the calculation unit 271 can adjust the frequency characteristics of the center signal based on the information related to frequency characteristics, etc.

[0061] In the television receiver 10, the calculation unit 153 supplies the treble component signal input from the audio device 20 via the center speaker cable 32 to the sound output unit 155. The sound output unit 155 reproduces and outputs a sound (a center sound in the mid-bass range) corresponding to the treble component signal supplied from the calculation unit 153. Meanwhile, in the audio device 20, the sound output unit 253 reproduces and outputs a sound (a center sound in the mid-bass range) corresponding to the mid-bass range component signal supplied from the calculation unit 271.

[0062] Fig. 6 is a diagram showing the relationship between frequency and sound pressure for high-frequency components and mid-low frequency components. In Fig. 6, with frequency (Hz) on the horizontal axis and sound pressure (dB) on the vertical axis, waveform A1 represents the relationship between frequency and sound pressure for high-frequency components, and waveform A2 represents the relationship between frequency and sound pressure for mid-low frequency components.

[0063] 6, frequencies higher than the frequency fa represented by the waveform A1 are treble components, and frequencies lower than the frequency fa represented by the waveform A2 are mid-low frequency components. In this way, the reproduction band is divided so that the treble component signal is reproduced from the sound output unit 155 of the television receiver 10, and the mid-low frequency component signal is reproduced from the sound output unit 253 of the audio device 20.

[0064] In the television receiver 10 and audio device 20 configured as described above, the playback sounds from the speakers are linked to simultaneously play sounds corresponding to the center signal (center sounds in the high frequency range and center sounds in the mid-low frequency range), thereby matching the positions of the video and the playback sounds and localizing the sound image within the screen.

[0065] Furthermore, in order to effectively coordinate the sounds reproduced by the speakers of the television receiver 10 and the audio device 20, the sound pressure level of the treble component represented by waveform A1 and the sound pressure level of the mid-low frequency component represented by waveform A2 may be reproduced together. For example, in Fig. 6, signal processing is performed so that the sound pressure level of the treble component and the sound pressure level of the mid-low frequency component are approximately the same at sound pressure pa.

[0066] 5 and 6 illustrate an example in which the playback band is divided into a high frequency range and a mid-low frequency range, but this division is for convenience's sake. For example, the low frequency range is generally defined as 20 Hz to 600 Hz, the mid frequency range as 800 Hz to 2000 Hz, and the high frequency range as 4000 Hz to 20000 Hz. In other words, when a predetermined frequency range is defined as a first frequency range and a frequency range lower than the first frequency range is defined as a second frequency range, the first frequency range includes the high frequency range and the second frequency range includes the mid-low frequency range. The frequency range may also be divided into two, a high frequency range and a low frequency range, in which case the high frequency range would be the first frequency range and the low frequency range would be the second frequency range.

[0067] (Third example) FIG. 7 is a block diagram showing a third example of the configuration of a playback system to which the present disclosure is applied.

[0068] In the configuration shown in Fig. 7, parts corresponding to those in the configuration shown in Fig. 5 are given the same reference numerals, and descriptions thereof will be omitted where appropriate. That is, in Fig. 7, compared to the configuration in Fig. 5, the input unit 151 is removed from the television receiver 10, and an input unit 281 is newly provided in the audio device 20.

[0069] 7, the audio device 20 includes an input unit 281, a calculation unit 271, and a sound output unit 253.

[0070] The input unit 281 is configured as an interface conforming to a predetermined standard such as HDMI (registered trademark), for example. When configured as an interface conforming to a predetermined standard, the input unit 281 supplies to the calculation unit 271 signals such as recorded content recorded by a recorder (recording / playback device), network storage, etc., and recorded content recorded on a recording medium such as an optical disc or semiconductor memory.

[0071] The calculation unit 271 outputs the video signal supplied from the input unit 281 to the television receiver 10 via the transmission cable 31. In the television receiver 10, the video signal from the audio device 20 is supplied to the calculation unit 153, and the video of the content is displayed on the display unit 154.

[0072] The calculation unit 271 also performs processes such as decoding and signal processing on the sound signal supplied from the input unit 281. As for the signal processing on the sound signal, as described with reference to Fig. 5 and Fig. 6, processing for controlling the frequency characteristics of the center signal is performed, and the high frequency component signal is output to the television receiver 10 via the center speaker cable 32, and the mid-low frequency component signal is supplied to the sound output unit 253.

[0073] In the television receiver 10, the treble component signal from the audio device 20 is supplied to the calculation unit 153, and a sound corresponding to the treble component signal (a center sound in the treble range) is reproduced by the sound output unit 155. On the other hand, in the audio device 20, a sound corresponding to the mid-low range component signal (a center sound in the mid-low range) is reproduced by the sound output unit 253.

[0074] In the television receiver 10 and audio device 20 configured as described above, the playback sounds from the speakers are linked to simultaneously play sounds corresponding to the center signal (center sounds in the high frequency range and center sounds in the mid-low frequency range), thereby matching the positions of the video and the playback sounds and localizing the sound image within the screen.

[0075] (Example 4) FIG. 8 is a block diagram showing a fourth example of the configuration of a playback system to which the present disclosure is applied.

[0076] In the configuration shown in Fig. 8, parts corresponding to those in the configuration shown in Fig. 4 are assigned the same reference numerals, and their description will be omitted where appropriate. That is, in Fig. 8, the television receiver 10 has the same configuration as in Fig. 4, but the audio device 20 is provided with a calculation unit 271 instead of the decoder 251, and is also provided with delay units 291 and 292.

[0077] 8, the audio device 20 includes a calculation unit 271, a distribution unit 252, a delay unit 291, a delay unit 292, a sound output unit 253, and a sound output unit 254.

[0078] The calculation unit 271 decodes the audio signal input from the television receiver 10 via the transmission cable 31, and supplies the resulting center signal to the distribution unit 252 and other channel signals to the delay unit 292. The distribution unit 252 distributes the center signal supplied from the calculation unit 271 and supplies it to the delay unit 291 and the television receiver 10 via the center speaker cable 32, respectively.

[0079] Information relating to the delay time of the center signal (hereinafter also referred to as delay time information) is input to the audio device 20 from the calculation unit 152 of the television receiver 10 via the transmission cable 31.

[0080] The delay unit 291 delays the center signal supplied from the distribution unit 252 based on the delay time information from the television receiver 10, and supplies the delayed signal to the sound output unit 253. The delay unit 292 delays the other channel signals supplied from the calculation unit 271 based on the delay time information from the television receiver 10, and supplies the delayed signal to the sound output unit 254.

[0081] In this way, the delay units 291 and 292 delay the center signal and the other channel signals, respectively, based on the delay time information from the television receiver 10, so that the playback sound (center sound) played by the television receiver 10 can be played earlier in time than the playback sound (center sound, other channel sounds) played by the audio device 20.

[0082] That is, when the television receiver 10 and the audio device 20 link the sounds reproduced by the speakers to simultaneously reproduce a sound (center sound) corresponding to a center signal, the sound reproduced from the television receiver 10 (center sound) is reproduced temporally prior to the sound reproduced from the audio device 20 (center sound), so that the sound reproduced from the television receiver 10 (center sound) is reproduced with a precedence sound effect, thereby making it possible to achieve in-plane localization with high acoustic performance.

[0083] The precedence effect refers to the localization of a sound image in the direction of the sound that reaches the user first, and by playing the sound (center sound) reproduced from the television receiver 10 earlier in time than the sound (center sound) reproduced from the audio device 20, the user's hearing can be localized on the television receiver 10 side.

[0084] 5 and 6, the calculation unit 271 may perform signal processing on the sound signal, so that the treble component signal is output to the television receiver 10 via the center speaker cable 32, and the mid-bass component signal is supplied to the delay unit 291. In this case, the delay unit 291 delays the mid-bass component signal from the calculation unit 271 based on the delay time information, and the sound output unit 253 reproduces and outputs a sound (a mid-bass center sound) corresponding to the delayed mid-bass component signal.

[0085] That is, when the television receiver 10 and the audio device 20 link the sounds reproduced by their speakers to simultaneously reproduce a sound (center sound) corresponding to a center signal, the sound reproduced from the television receiver 10 (high-frequency center sound) is reproduced temporally before the sound reproduced from the audio device 20 (mid-low frequency center sound), whereby the sound reproduced from the television receiver 10 (high-frequency center sound) is reproduced with a precedence sound effect, making it possible to achieve in-plane localization with high acoustic performance.

[0086] (Speaker placement example) 9 and 10 are diagrams showing a first example of the arrangement of devices constituting a playback system to which the present disclosure is applied. Here, Fig. 9 shows a front view of a television receiver 10 among the devices constituting the playback system installed in a room, and Fig. 10 shows a top view thereof.

[0087] 9, the playback system to which the present disclosure is applied is configured as an AV system in which a television receiver 10, an audio device 20, and a plurality of separate speakers 40 are arranged. In this AV system, a center channel speaker is arranged near the television receiver 10, and multi-channel speakers are arranged around the user.

[0088] That is, in Figure 9, the 7.1 channel speakers, which are front speakers 40-FL, 40-FR, center speaker 40-CNT, surround speakers 40-SL, 40-SR, surround back speakers 40-SBL, 40-SBR, and subwoofer 40-SW, are combined with top front speakers 40-TFL, 40-TFR and top rear speakers 40-TRL, 40-TRR.

[0089] In FIG. 9, the television receiver 10 and the audio device 20 work together to simultaneously play back a sound (center sound) corresponding to a center signal played by the television receiver 10 and a sound (center sound) corresponding to a center signal played by the center speaker 40-CNT, thereby matching the positions of the video and the played back sound and localizing the sound image within the screen.

[0090] (Second example) FIG. 11 is a diagram showing a second example of the arrangement of devices that make up a playback system to which the present disclosure is applied.

[0091] 11, the playback system to which the present disclosure is applied is configured as an AV system including a television receiver 10 and an audio device 20 serving as a sound bar. The audio device 20 has a rod-shaped housing incorporating multi-channel speakers and an AV amplifier.

[0092] The audio device 20 has built-in front speakers 50-FL and 50-FR, a center speaker 50-CNT, and a subwoofer 50-SW. Furthermore, the audio device 20 can virtually reproduce sounds from top speakers (TL, TR), surround speakers (SL, SR), and surround back speakers (SBL, SBR) by reflecting the reproduced sounds output from the built-in speakers off the ceiling C using virtual surround technology.

[0093] In FIG. 11, the television receiver 10 and the audio device 20 work together to simultaneously play back a sound (center sound) corresponding to a center signal played by the television receiver 10 and a sound (center sound) corresponding to a center signal played by the center speaker 50-CNT, thereby matching the positions of the video and the played back sound and localizing the sound image within the screen.

[0094] (Third example) FIG. 12 is a diagram showing a third example of the arrangement of devices that make up a playback system to which the present disclosure is applied.

[0095] 12, a playback system to which the present disclosure is applied is configured as an AV system including a television receiver 10 and a plurality of speakers 60. In Fig. 12, front speakers 60-L and 60-R and surround speakers 60-SL and 60-RL are arranged. Although this AV system does not include a center speaker, it can be configured equivalent to a system including a center speaker by reproducing a center sound by synthesizing sounds (sound waves) output from the front speakers 60-L and 60-R and the surround speakers 60-SL and 60-RL.

[0096] Here, by using a technology that synthesizes sound waves from multiple real speakers and reproduces a sound source at any position, it is possible to reproduce, at any position, a sound (center sound) corresponding to a center signal reproduced by a center speaker. As this type of technology, the applicant has proposed a technology called monopole synthesis, which is disclosed in the following documents, etc., and this technology can also be applied to the configuration shown in Figure 12.

[0097] Reference: US Patent No. 9,749,769

[0098] Although FIG. 12 shows an example in which sound waves from four speakers 60 are synthesized, the number of real speakers may be three or more, and it is desirable to provide more real speakers in order to reproduce the sound source.

[0099] In FIG. 12, by simultaneously playing back a sound (center sound) corresponding to a center signal played back by the television receiver 10 and a center sound reproduced by synthesizing sounds (sound waves) output from the front speakers 60-L, 60-R and the surround speakers 60-SL, 60-RL, the positions of the video and the reproduced sound can be matched, and the sound image can be localized within the screen.

[0100] <2. Modifications>

[0101] (Cable connection status monitoring) 4, 5, etc., the television receiver 10 and the audio device 20 are connected via a center speaker cable 32 to exchange center signals. Since the center speaker cable 32 is installed by the user who purchases the device, it is possible that the connection may not be correct. Therefore, the AV system 1 can monitor the connection status of the center speaker cable 32 and issue a notification according to the monitoring results.

[0102] FIG. 13 is a diagram showing an example of a notification according to the connection state of the center speaker cable 32. In FIG.

[0103] In FIG. 13, in the audio device 20, the calculation unit 271 etc. monitors the state of the terminal 262 and notifies the television receiver 10 of connection state information indicating the connection state of the center speaker cable 32 via the transmission cable 31 at a predetermined timing.

[0104] In the television receiver 10 , the calculation unit 152 and the like perform various processes according to the connection state of the center speaker cable 32 based on the connection state information notified from the audio device 20 via the transmission cable 31 .

[0105] For example, in the case where the television receiver 10 is configured with respect to in-plane localization in response to a user operation, if the center speaker cable 32 is not properly connected, the user is notified of a message urging the user to reconnect the center speaker cable 32, as shown in Fig. 13. This message may be notified by sound from the sound output unit 155, or may be notified by displaying text, an image, or the like on the display unit 154, for example.

[0106] Furthermore, in the case where the television receiver 10 has been set up for in-plane localization, if the center speaker cable 32 is connected normally, the setting for in-plane localization continues to be performed.

[0107] In this way, in the AV system 1, when settings related to in-plane localization are made while the center speaker cable 32 is not connected, a predetermined message prompts the user to connect the center speaker cable 32, allowing the user to reliably reconnect the cable. On the other hand, when settings related to in-plane localization are made while the center speaker cable 32 is properly connected, the settings continue without any connection prompting, allowing the settings to be completed quickly.

[0108] (Other configuration examples) In the above description, the AV system 1 has been described as an example of a playback system to which the present disclosure is applied. The AV system 1 is composed of a television set 10 and an audio device 20. The television set 10 is an example of a display device to which the present disclosure is applied, and the audio device 20 is an example of a playback device to which the present disclosure is applied.

[0109] 9 and 10, the audio device 20 can be configured as an AV amplifier, speakers, etc. In this configuration, for example, the AV amplifier (including the decoder 251 and the distribution unit 252) is connected to the television receiver 10 via the transmission cable 31 and the center speaker cable 32, and the AV amplifier and multiple speakers (including the sound output unit 253 or the sound output unit 254) are connected by wired communication or wireless communication.

[0110] 11, the audio device 20 can be configured as a sound bar. In this configuration, the sound bar (including the decoder 251, the distribution unit 252, the sound output unit 253, and the sound output unit 254) is connected to the television receiver 10 via the transmission cable 31 and the center speaker cable 32.

[0111] (Computer Configuration) The above-described series of processes (e.g., signal processing by audio device 20) can be executed by hardware or software. When the series of processes is executed by software, a program constituting the software is installed in the computer of each device. Fig. 14 is a block diagram showing an example of the hardware configuration of a computer that executes the above-described series of processes by a program.

[0112] 14, a CPU (Central Processing Unit) 1001, a ROM (Read Only Memory) 1002, and a RAM (Random Access Memory) 1003 are interconnected by a bus 1004. An input / output interface 1005 is further connected to the bus 1004. An input unit 1006, an output unit 1007, a storage unit 1008, a communication unit 1009, and a drive 1010 are connected to the input / output interface 1005.

[0113] The input unit 1006 includes a microphone, various sensors, etc. The output unit 1007 includes a speaker, a display, etc. The storage unit 1008 includes a non-volatile memory, a hard disk, etc. The communication unit 1009 includes a network interface, etc. The drive 1010 drives removable media 1011 such as a magnetic disk, optical disk, magneto-optical disk, or semiconductor memory.

[0114] In the computer configured as above, the CPU 1001 loads a program recorded in the ROM 1002 or the storage unit 1008 into the RAM 1003 and executes it, thereby performing the above-described series of processes.

[0115] The program executed by the computer (CPU 1001) can be provided by being recorded on removable media 1011 such as package media, for example. The program can also be provided via wired or wireless transmission media such as a local area network, the Internet, or digital satellite broadcasting.

[0116] In a computer, the program can be installed in the storage unit 1008 via the input / output interface 1005 by inserting the removable medium 1011 into the drive 1010. The program can also be received by the communication unit 1009 via a wired or wireless transmission medium and installed in the storage unit 1008. Alternatively, the program can be installed in the ROM 1002 or the storage unit 1008 in advance.

[0117] In this specification, the processing performed by a computer according to a program includes processing executed in parallel or individually (for example, parallel processing or object-based processing). Furthermore, the program may be processed by one computer (processor) or distributed among multiple computers.

[0118] It should be noted that the embodiments of the present disclosure are not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present disclosure. Furthermore, the effects described in this specification are merely examples and are not intended to be limiting, and other effects may also be obtained.

[0119] The present disclosure can also be configured as follows.

[0120] (1) In a playback system comprising a display device and a playback device, The display device includes: a display unit that displays video of the content; a first sound output unit that outputs the sound of the content so that a sound image is localized within the screen of the display unit; Equipped with The playback device a processing unit that processes an audio signal of the content; a second sound output unit that outputs the sound of the content; Equipped with The first sound output unit and the second sound output unit simultaneously output sounds based on the sound signal of the center channel of the content. Playback system. (2) a display unit that displays video of the content; a first sound output unit that outputs the sound of the content so that a sound image is localized within the screen of the display unit; Equipped with The first sound output unit outputs a sound corresponding to the center channel sound signal of the content simultaneously with the second sound output unit of the playback device. Display device. (3) the first sound output unit outputs a sound in a first range included in the sound of the content; The second sound output unit outputs a sound in a second range that is lower than the first range. The display device according to (2) above. (4) the first range includes a high range, The second range includes a midrange and a low range. The display device according to (3) above. (5) The first sound output unit outputs the sound in the first range prior to the sound in the second range output from the second sound output unit. The display device according to (3) or (4). (6) The first sound range and the second sound range have substantially the same sound pressure level. The display device according to any one of (3) to (5) above. (7) an input unit for inputting a video signal and an audio signal of the content; a processing unit for processing a video signal and an audio signal of the content; Furthermore, the processing unit outputs an audio signal of the content to the playback device; The first sound output unit outputs the sound of the content based on the sound signal of the center channel input from the playback device. The display device according to any one of (2) to (6) above. (8) the display unit is a liquid crystal display unit, The first sound output unit includes an actuator that vibrates a bezel portion around the screen of the liquid crystal display unit. The display device according to any one of (2) to (7) above. (9) the display unit is an organic electroluminescence (EL) display unit, The first sound output unit includes an actuator that vibrates the screen of the organic EL display unit. The display device according to any one of (2) to (7) above. (10) A television receiver is installed near the playback device. The display device according to any one of (2) to (9). (11) a processing unit that processes sound signals of the content; a second sound output unit that outputs sound based on a sound signal of the content; Equipped with The second sound output unit outputs a sound corresponding to the sound signal of the center channel of the content, simultaneously with the first sound output unit which outputs the sound of the content so that a sound image is localized within a screen of a display unit provided in a display device based on the sound signal of the center channel of the content. playback device. (12) the processing unit extracts a first range of sound included in the sound of the content and a second range of sound that is lower than the first range of sound, based on the sound signal of the center channel; the first sound output unit outputs a sound in the first range; The second sound output unit outputs a sound in the second range. The playback device according to (11) above. (13) the first range includes a high range, The second range includes a midrange and a low range. The playback device according to (12) above. (14) The processing unit adjusts the frequency characteristics of the center channel sound signal based on information about the frequency characteristics input from the display device. The playback device according to (12) or (13) above. (15) a delay unit that delays a sound signal corresponding to the second sound range so that the sound in the first sound range output from the first sound output unit is output temporally earlier than the sound in the second sound range output from the second sound output unit. The playback device according to any one of (12) to (14). (16) The delay unit delays the sound signal corresponding to the second range based on information about a delay time of the sound signal of the center channel input from the display device. The playback device according to (15) above. (17) The processing unit adjusts the sound pressure levels of the first sound range and the second sound range so that they are substantially the same. The playback device according to any one of (12) to (16). (18) The processing unit processing an audio signal of the content input from the display device; The center channel audio signal obtained from the audio signal of the content is supplied to the second audio output unit and output to the display device. The playback device according to any one of (11) to (17). (19) further comprising an input unit for inputting a video signal and an audio signal of the content; The processing unit outputting a video signal of the content to the display device; The center channel audio signal obtained from the audio signal of the content is supplied to the second audio output unit and output to the display device. The playback device according to any one of (11) to (17). (20) The display device is configured as an audio device installed near the display device. The playback device according to any one of (11) to (19). [Explanation of symbols]

[0121] 1 AV system, 10 television receiver, 20 audio equipment, 31 transmission cable, 32 center speaker cable, 111, 112 actuator, 113, 114 speaker, 131, 132 actuator, 133, 134 speaker, 151 input section, 152 calculation section, 153 calculation section, 154 display section, 155 sound output section, 156 synthesis section, 157 AD converter, 158 selector, 251 decoder, 252 distribution section, 253 sound output section, 254 sound output section, 271 calculation section, 281 input section, 291 delay section, 292 delay section, 1001 CPU

Claims

1. In a playback system comprising a display device and a playback device, The display device includes: a display unit that displays video of the content; a first sound output unit that outputs the sound of the content so that a sound image is localized within the screen of the display unit; Equipped with The playback device a processing unit that processes an audio signal of the content; a second sound output unit that outputs the sound of the content; Equipped with the first sound output unit and the second sound output unit output sounds based on a sound signal of a center channel of the content; the first sound output unit outputs a high-pitched sound included in the sound of the content by vibrating a component related to the display unit; the second sound output unit is configured to output mid-range and low-range sounds, which are lower than the treble range, from a speaker corresponding to the center channel, The second sound output unit complements and outputs a low frequency range that is limited in reproduction by the sound output by the first sound output unit due to vibration of the component in the reproduction system. Playback system.

2. the display unit is a liquid crystal display unit, The first sound output unit includes an actuator that vibrates a bezel portion around the screen of the liquid crystal display unit, and at least one speaker that is provided below the actuator and below the liquid crystal display unit. The playback system of claim 1 .

3. the display unit is an organic electroluminescence (EL) display unit, The first sound output unit includes an actuator that vibrates the screen of the organic EL display unit, and at least one speaker that is provided below the actuator at the bottom of the organic EL display unit. The playback system of claim 1 .

4. The high-pitched sound output from the first sound output unit is output temporally earlier than the mid-pitched sound and the low-pitched sound output from the second sound output unit. The playback system of claim 1 .

5. The playback device further includes a delay unit that delays sound signals corresponding to the mid-range and the low-range so that the high-range sound output from the first sound output unit is output temporally earlier than the mid-range and low-range sounds output from the second sound output unit. The playback system of claim 4.

6. The delay unit delays the sound signals corresponding to the mid-range and the low-range based on information about a delay time of the sound signal of the center channel input from the display device. The playback system of claim 5 .

7. The processing unit extracts the high-frequency sound, the mid-frequency sound, and the low-frequency sound included in the sound of the content based on the sound signal of the center channel. The playback system of claim 1 .

8. The processing unit processing an audio signal of the content input from the display device; supplying sound signals corresponding to the mid-range and low-range obtained from the sound signal of the content to the second sound output unit, and outputting a sound signal corresponding to the high-range to the display device; The playback system of claim 7.

9. The processing unit adjusts the sound pressure levels of the high frequency range, the mid frequency range, and the low frequency range so that they are substantially equal to each other. The playback system of claim 7.

10. the display device is a television set installed near the playback device, The playback device is an audio device installed near the display device. The playback system of claim 1 .

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