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Video/audio reproducing apparatus

A technology for sound reproduction and video, which is applied to sound reproduction devices. In the field of video, it can solve the problem of corresponding video transmission rate and achieve the effect of simple output.

Inactive Publication Date: 2011-07-06
HITACHT MAXELL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because, although the delay of the image occurs as a result of performing multiple image processing, the transfer rate of the image does not correspond to the image processing method one-to-one

Method used

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  • Video/audio reproducing apparatus
  • Video/audio reproducing apparatus
  • Video/audio reproducing apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]

[0042] First, use Figure 1 to Figure 11 A configuration example of a receiving device and peripheral devices will be described.

[0043] figure 1 It is a schematic diagram showing an example of data input and output of a receiving device. 1 indicates a broadcasting station. 2 indicates a broadcasting satellite. The receiving device 3 receives the signal transmitted from the broadcast satellite, performs processing such as expanding the compressed data, and outputs the compressed data to the display device 4 . In addition to broadcast waves, various forms of waves can be used for input, and signals sent by broadcasting stations with terrestrial waves can also be received. Or it can be considered to receive information from a transmission information server 5 that transmits data via a network such as the Internet, or to connect from a transmission method capable of high-speed data transmission such as a local area network (home network), such as HDMI (High-Defini...

Embodiment 2

[0120] Consider a case where the delay units 506 and 605, or the delay units 805 and 905 do not exist, and the transmission time of video and audio differs in the data transmission between the receiving device 3 and the display device 4 . In this case, the control unit 320 corrects the time difference through the delay unit 307 or the offset adding unit 1102 if the time difference is determined in advance in accordance with the transmission unit. For example, a method for automatically obtaining the difference in transmission time is shown.

[0121] In the wireless signal transmission unit 312 , time stamps are added to transmitted video and audio data at a constant timing. The value of the added time stamp is acquired in the wireless signal receiving unit 404 , and the difference thereof is calculated by the control unit 408 . Figure 4 In the case of (b), the calculated time difference can be corrected in the delay unit 410 , or the calculated time difference can be sent to...

Embodiment 3

[0123] In Embodiment 1, the method of delaying the audio output was described, but for example, before decoding the video data, it is also possible to add an offset to the DTS (Decoding Time Stamp, decoding time stamp) and the PTS, so that the video data The timing of the decoding process is adjusted back and forth. For example, when the audio output from light is delayed by the audio amplifier 7 at the output location, synchronization can be achieved by setting appropriate offsets for the DTS and PTS of the video data.

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Abstract

The invention provides a video / audio reproducing apparatus, easily obtains the synchronization for the video and the audio according to the invention, more particularly when a video display apparatus and an audio output apparatus are connected in series, according to a transmission delay amount, an audio delay method respectively uses an offset part and an offset amount supply method.

Description

technical field [0001] The present invention relates to a device for reproducing video and sound. Background technique [0002] Regarding the above-mentioned technical field, in Patent Document 1, the technical problem described is "to provide an audio and video transmission system, which can appropriately reduce the occurrence of problems caused by the transmission of audio and video signals whose reproduction timing should be matched by different transmission methods." The deviation between the reproduced sound and the reproduced video." The technical means to solve the problem described is "Audio and video transmission device, the video signal is transmitted wirelessly by the video wireless transmission part, and the audio signal is transmitted by wire by the sound output part. In this case, use The phase difference between the transmitted audio signal and video signal is reduced to such an extent that the viewer who listens to the audio and video reproduced by these sign...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/56H04N7/173H04N21/44H04N21/81H04N21/83
Inventor 金丸隆鹤贺贞雄
Owner HITACHT MAXELL LTD