Long-distance lossless distributed transmission equipment for video and audio signals

Abstract

The utility model discloses long-distance lossless distributed transmission equipment for video and audio signals. The long-distance lossless distributed transmission equipment comprises an upper computer, a video and audio signal sending host, a video and audio signal input line, a video and audio signal receiving host, a video and audio signal transmission medium-optical fiber, a video and audio signal output line and a terminal display screen, the video and audio signal sending host receives video and audio signals sent by an upper computer, divides the video and audio signals into 8 paths, and transmits the 8 paths of video and audio signals to the video and audio signal receiving host through a video and audio signal transmission medium-optical fiber; the video and audio signal receiving host transmits the video and audio signal to the terminal display screen through the video and audio signal output line; when the equipment or the transmission line is damaged, the video and audio signal receiving host outputs the pre-stored video and audio signal source to the terminal display screen, so that the problem of blank screen of the terminal display screen is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of video and audio transmission, and in particular relates to a long-distance lossless distributed transmission device for video and audio signals. Background Art

[0002] With the rapid development of electronic information display technology, people have higher and higher requirements for the transmission distance, security, high-definition image quality, and display diversity (such as one signal divided into regions and split screens) of audio and video displays. The traditional audio and video signal transmission solution consists of a host computer (0), a screen splitter (10), a terminal display screen (8), and an audio and video signal transmission medium - a coaxial cable (9); the screen splitter (10) receives the audio and video signal transmitted by the host computer (0) through the audio and video signal transmission medium - the coaxial cable (9); the audio and video signal is divided into 8 channels by the screen splitter (10), and then transmitted to the terminal display screen (8) by the audio and video signal transmission medium - the coaxial cable (9) for playback and display; its principle is detailed in Figure 1 : Schematic diagram of the traditional audio and video signal transmission structure; its main disadvantages are as follows:

[0003] 1) If the audio and video signals output by the host computer (0) are digital signals, they need to be compressed and encoded into analog signals and transmitted through the audio and video signal transmission medium - coaxial cable. This method has a short transmission distance, and the high-frequency component attenuation is large above 300 meters, and the image quality cannot be guaranteed. In addition, it is interfered by various noises on the transmission road, and it is difficult to separate the noise interference and the signal, which further reduces the communication quality.

[0004] 2) During the transmission process, analog signals are easily eavesdropped and communication information is obtained, resulting in poor information transmission security.

[0005] 3) For each audio and video signal, a separate audio and video signal transmission medium, a coaxial cable (9), is required; this results in a large amount of wiring, difficult maintenance, and poor scalability.

[0006] 4) Failure of the host computer (0) or the screen splitter (10) or damage to the audio and video signal transmission medium - the coaxial cable (9) line will cause the terminal display screen (8) to be unable to receive the host computer (0) signal, resulting in a black screen; especially for public display screens, it will affect customer viewing experience and advertising revenue. Utility Model Content

[0007] In view of the deficiencies in the above-mentioned prior art, the purpose of the utility model is to provide a long-distance lossless distributed transmission device for audio and video signals to solve the drawbacks of traditional audio and video signal transmission solutions; and in the event of signal input interruption or audio and video signal transmission line damage, the terminal display screen can normally play pre-prepared audio and video information.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0009] The utility model discloses a long-distance lossless distributed transmission device for audio and video signals, comprising: a host computer (0), an audio and video signal sending host (1), an audio and video signal input line (14), an audio and video signal receiving host (2), an audio and video signal transmission medium-optical fiber (11), an audio and video signal output line (12), and a terminal display screen (8). The input end of the audio and video signal sending host (1) is connected to the host computer (0) to receive the audio and video signal sent by the host computer (0); the output end is connected to the audio and video signal receiving host (2) through the audio and video signal transmission medium-optical fiber (11), and sends the audio and video signal to the audio and video signal receiving host (2); the output end of the audio and video signal receiving host (2) is connected to the terminal display screen (8) through the audio and video signal output line (12).

[0010] Furthermore, the video and audio signal sending host (1) comprises: a video and audio signal sending module (3), a 1-to-8 passive SC splitter (4) and a power module (5). The input end of the power module (5) is connected to a 220V power supply (13), and the 220V power supply is converted into a 12V power supply, and the video and audio signal sending module (3) is powered by a 12V power line (15). The video and audio signal sending module (3) receives a video and audio signal sent by the host computer (0) through the video and audio signal input line (14); after the signal is encoded and encrypted, it is transmitted to the 1-to-8 passive SC splitter (4) through the video and audio signal transmission medium-optical fiber (11); the 1-to-8 passive SC splitter (4) divides the received video and audio signal into eight output video and audio signals according to the principle of equal distribution of optical power.

[0011] Furthermore, the audio-visual signal receiving host (2) comprises: an audio-visual signal receiving module (6), an audio-visual signal conversion module (7) and a power module (5). The audio-visual signal receiving module (6) receives an audio-visual signal from the audio-visual signal sending host (1) via an audio-visual signal transmission medium-optical fiber (11), and transmits the audio-visual signal to the audio-visual signal conversion module (7); after the audio-visual signal conversion module (7) performs audio-visual decoding and conversion processing, the audio-visual signal is output to the terminal display screen (8) via an audio-visual signal output line (12). The power module (5) converts a 220V power supply into a 12V power supply, and supplies power to the audio-visual signal receiving module (6) and the audio-visual signal conversion module (7) via a 12V power line (15).

[0012] Furthermore, the video and audio signals sent by the host computer (0) are digital signals, the video and audio signal transmission medium - optical fiber (11) is a single-mode single-core optical fiber, and the 1-to-8 passive SC splitter (4) is a passive device.

[0013] Furthermore, in order to meet the requirements of different types of audio and video signal input interfaces, the audio and video signal input interface of the audio and video signal sending module (3) includes: SC IN, HDMI IN, DP IN, DVI IN and other common audio and video signal interfaces; it is connected to the host computer (0) via an audio and video signal input line (14) to receive audio and video signals; and the output interface includes an 8-way SC interface.

[0014] Furthermore, in order to meet the requirements of different types of audio and video signal output interfaces, the audio and video signal output interface of the audio and video signal conversion module (7) includes: SC, HDMI, DP, DVI and other audio and video signal interfaces; it is connected to the terminal display screen (8) via an audio and video signal output line (12); and the input interface includes a SC IN interface.

[0015] Furthermore, the audio and video signal input line (14) can use different types of audio and video signal input lines, such as SC optical fiber, 4K high-definition HDMI line, high-definition DVI line, 4K high-definition DP line, etc., according to different types of audio and video signal interfaces of the host computer (0); the audio and video signal output line (12) can use different types of audio and video signal output lines, such as SC optical fiber, 4K high-definition HDMI line, high-definition DVI line, 4K high-definition DP line, etc., according to different types of audio and video signal interfaces of the terminal display screen (8).

[0016] Furthermore, the video and audio signal receiving module (6) receives a video and audio signal sent by the 1-to-8 passive SC splitter (4) via the video and audio signal transmission medium - optical fiber (11), and outputs the signal to the video and audio signal conversion module (7); the video and audio signal conversion module (7) is used to decode the video and audio signal and convert it into a specific interface type signal that can be received by the terminal display screen (8), such as HDMI, DVI, DP; if the terminal display screen (8) can receive optical signals (SC), no conversion is required and the signal can be directly output.

[0017] Furthermore, the audio-visual signal conversion module (7) further comprises an audio-visual signal storage module (16); when the audio-visual signal source input in the upper computer (0) is interrupted, or the audio-visual signal sending host (1) fails, or the audio-visual signal transmission medium - optical fiber (11) is damaged so that the audio-visual signal receiving module (6) fails to receive external audio-visual signals, the audio-visual signal storage module (16) outputs the pre-stored audio-visual signal source to the terminal display screen (8), thereby avoiding the problem of the terminal display screen being black.

[0018] Beneficial effects of the utility model:

[0019] 1. The utility model adopts a distributed design. The failure of any audio and video signal receiving host will not cause the failure of other audio and video signal receiving hosts. It has the advantage that a single-channel failure does not affect the normal audio and video signal transmission and playback of other transmission lines.

[0020] 2. The utility model adopts optical fiber as the transmission medium for audio and video signals, and its signal transmission is more advanced, highly reliable, highly stable, and has more outstanding anti-interference performance. It is also suitable for long-distance transmission. Under the premise of ensuring the quality of audio and video signals, the transmission distance can reach more than 20 kilometers.

[0021] 3. When the audio and video signal source input in the host computer (0) is interrupted, or the audio and video signal sending host (1) fails, or the audio and video signal transmission medium - optical fiber (11) is damaged, causing the audio and video signal receiving module (6) to fail to receive external audio and video signals, the built-in audio and video signal (pre-stored in the audio and video signal storage module) is played to solve the terminal black screen problem caused by damage to the equipment or transmission line; improve customer viewing experience and increase operating income. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the traditional audio and video signal transmission structure.

[0023] Figure 2 This is a schematic diagram of the audio and video signal transmission structure of the utility model.

[0024] Figure 3 This is a schematic diagram of the video and audio signal sending host of the utility model.

[0025] Figure 4 This is a schematic diagram of a video and audio signal receiving host of the utility model. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0027] Reference Figure 2As shown, the utility model is a long-distance lossless distributed transmission device for audio and video signals, comprising: a host computer (0), an audio and video signal sending host (1), an audio and video signal input line (14), an audio and video signal receiving host (2), an audio and video signal transmission medium-optical fiber (11), an audio and video signal output line (12), and a terminal display screen (8). The input end of the audio and video signal sending host (1) is connected to the host computer (0) to receive the audio and video signal sent by the host computer (0); the output end is connected to the audio and video signal receiving host (2) through the audio and video signal transmission medium-optical fiber (11), and sends the audio and video signal to the audio and video signal receiving host (2); the output end of the audio and video signal receiving host (2) is connected to the terminal display screen (8) through the audio and video signal output line (12).

[0028] Reference Figure 3 As shown, the video and audio signal sending host (1) includes: an video and audio signal sending module (3), a 1-to-8 passive SC splitter (4) and a power module (5). The input end of the power module (5) is connected to a 220V power supply (13), and the 220V power supply is converted into a 12V power supply, and the video and audio signal sending module (3) is powered by a 12V power line (15). The video and audio signal sending module (3) receives a video and audio signal sent by the host computer (0) through the video and audio signal input line (14); after the signal is encoded and encrypted, it is transmitted to the 1-to-8 passive SC splitter (4) through the video and audio signal transmission medium-optical fiber (11); the 1-to-8 passive SC splitter (4) divides the received video and audio signal into eight output video and audio signals according to the principle of equal distribution of optical power.

[0029] Reference Figure 4 As shown, the audio-visual signal receiving host (2) comprises: an audio-visual signal receiving module (6), an audio-visual signal conversion module (7) and a power module (5). The audio-visual signal receiving module (6) receives an audio-visual signal from the audio-visual signal sending host (1) through the audio-visual signal transmission medium-optical fiber (11), and transmits it to the audio-visual signal conversion module (7); after the audio-visual signal conversion module (7) performs audio-visual decoding and conversion processing, the audio-visual signal is output to the terminal display screen (8) through the audio-visual signal output line (12). The power module (5) converts 220V power into 12V power, and supplies power to the audio-visual signal receiving module (6) and the audio-visual signal conversion module (7) through the 12V power line (15).

[0030] Furthermore, the video and audio signals sent by the host computer (0) are digital signals, the video and audio signal transmission medium - optical fiber (11) is a single-mode single-core optical fiber, and the 1-to-8 passive SC splitter (4) is a passive device.

[0031] Reference Figure 2 , Figure 3 As shown, in order to meet the requirements of different types of audio and video signal input interfaces, the audio and video signal input interfaces of the audio and video signal sending module (3) include: SC IN, HDMI IN, DP IN, DVI IN and other common audio and video signal interfaces; it is connected to the host computer (0) via an audio and video signal input line (14) to receive audio and video signals; the output interface includes 8 SC interfaces.

[0032] Reference Figure 2 , Figure 4 As shown, in order to meet the requirements of different types of audio and video signal output interfaces, the audio and video signal output interfaces of the audio and video signal conversion module (7) include: SC, HDMI, DP, DVI and other audio and video signal interfaces; it is connected to the terminal display screen (8) via an audio and video signal output line (12); the input interface includes a SC IN interface.

[0033] Furthermore, the audio and video signal input line (14) can use different types of audio and video signal input lines, such as SC optical fiber, 4K high-definition HDMI line, high-definition DVI line, 4K high-definition DP line, etc., according to different types of audio and video signal interfaces of the host computer (0); the audio and video signal output line (12) can use different types of audio and video signal output lines, such as SC optical fiber, 4K high-definition HDMI line, high-definition DVI line, 4K high-definition DP line, etc., according to different types of audio and video signal interfaces of the terminal display screen (8).

[0034] Reference Figure 2 , Figure 3 , Figure 4 As shown, the video and audio signal receiving module (6) receives a video and audio signal sent by the 1-to-8 passive SC splitter (4) through the video and audio signal transmission medium - optical fiber (11), and outputs it to the video and audio signal conversion module (7); the video and audio signal conversion module (7) is used to decode the video and audio signal and convert it into a specific interface type signal that can be received by the terminal display screen (8), such as HDMI, DVI, DP; if the terminal display screen (8) can receive optical signals (SC), no conversion is required and it can be directly output.

[0035] Reference Figure 2 , Figure 4 As shown, the audio-visual signal conversion module (7) further includes an audio-visual signal storage module (16); when the audio-visual signal source input in the upper computer (0) is interrupted, or the audio-visual signal sending host (1) fails, or the audio-visual signal transmission medium-optical fiber (11) is damaged so that the audio-visual signal receiving module (6) fails to receive external audio-visual signals, the audio-visual signal storage module (16) outputs the pre-stored audio-visual signal source to the terminal display screen (8) to avoid the problem of the terminal display screen being black.

[0036] Reference Figure 2 , Figure 3 , Figure 4 As shown, the beneficial effects of the utility model are:

[0037] 1. The utility model adopts a distributed design. The failure of any audio and video signal receiving host will not cause the failure of other audio and video signal receiving hosts. It has the advantage that a single-channel failure does not affect the normal audio and video signal transmission and playback of other transmission lines.

[0038] 2. The utility model adopts optical fiber as the transmission medium for audio and video signals, and its signal transmission is more advanced, highly reliable, highly stable, and has more outstanding anti-interference performance. It is also suitable for long-distance transmission. Under the premise of ensuring the quality of audio and video signals, the transmission distance can reach more than 20 kilometers.

[0039] 3. When the audio and video signal source input in the host computer (0) is interrupted, or the audio and video signal sending host (1) fails, or the audio and video signal transmission medium - optical fiber (11) is damaged, causing the audio and video signal receiving module (6) to fail to receive external audio and video signals, the built-in audio and video signal (pre-stored in the audio and video signal storage module) is played to solve the terminal black screen problem caused by damage to the equipment or transmission line; improve customer viewing experience and increase operating income.

[0040] The utility model has many specific application paths. The above is only the preferred implementation mode of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the utility model. These improvements should also be regarded as the protection scope of the utility model.

Claims

1. A long-distance lossless distributed transmission device for audio and video signals, comprising: A host computer (0), an audio-visual signal sending host (1), an audio-visual signal input line (14), an audio-visual signal receiving host (2), an audio-visual signal transmission medium-optical fiber (11), an audio-visual signal output line (12), and a terminal display screen (8); wherein the input end of the audio-visual signal sending host (1) is connected to the host computer (0) to receive the audio-visual signal sent by the host computer (0); the output end is connected to the audio-visual signal receiving host (2) via the audio-visual signal transmission medium-optical fiber (11) to send the audio-visual signal to the audio-visual signal receiving host (2); and the output end of the audio-visual signal receiving host (2) is connected to the terminal display screen (8) via the audio-visual signal output line (12).

2. The long-distance lossless distributed transmission device for audio and video signals according to claim 1 is characterized in that: The video and audio signal transmitting host (1) comprises: a video and audio signal transmitting module (3), a 1-to-8 passive SC optical splitter (4) and a power module (5). The input end of the power module (5) is connected to a 220V power supply (13), and the 220V power supply is converted into a 12V power supply. The video and audio signal transmitting module (3) is powered via a 12V power line (15). The video and audio signal transmitting module (3) receives a video and audio signal sent by a host computer (0) via a video and audio signal input line (14). After the signal is encoded and encrypted, it is transmitted to the 1-to-8 passive SC optical splitter (4) via an audio and video signal transmission medium-optical fiber (11). The 1-to-8 passive SC optical splitter (4) outputs the received video and audio signal in eight channels according to the principle of equal distribution of optical power.

3. The long-distance lossless distributed transmission device for audio and video signals according to claim 1 is characterized in that: The audio-visual signal receiving host (2) comprises: an audio-visual signal receiving module (6), an audio-visual signal conversion module (7) and a power module (5). The audio-visual signal receiving module (6) receives an audio-visual signal from an audio-visual signal sending host (1) via an audio-visual signal transmission medium-optical fiber (11), and transmits the audio-visual signal to the audio-visual signal conversion module (7). After the audio-visual signal conversion module (7) performs audio-visual decoding and conversion processing, the audio-visual signal is output to a terminal display screen (8) via an audio-visual signal output line (12). The power module (5) converts a 220V power supply into a 12V power supply, and supplies power to the audio-visual signal receiving module (6) and the audio-visual signal conversion module (7) via a 12V power line (15).

4. The long-distance lossless distributed transmission device for audio and video signals according to claim 1 is characterized in that: The video and audio signals sent by the host computer (0) are digital signals, the video and audio signal transmission medium - optical fiber (11) is a single-mode single-core optical fiber, and the 1-to-8 passive SC optical splitter (4) is a passive device.

5. The long-distance lossless distributed transmission device for audio and video signals according to claim 2 is characterized in that: The audio and video signal input interface of the audio and video signal sending module (3) includes common audio and video signal interfaces such as SC IN, HDMI IN, DP IN, DVI IN, etc. It is connected to the host computer (0) via an audio and video signal input line (14) to receive audio and video signals; the output interface includes 8 SC interfaces.

6. The long-distance lossless distributed transmission device for audio and video signals according to claim 3 is characterized in that: The audio and video signal output interface of the audio and video signal conversion module (7) includes: SC, HDMI, DP, DVI and other audio and video signal interfaces; it is connected to the terminal display screen (8) via an audio and video signal output line (12); the input interface includes a SC IN interface.

7. The long-distance lossless distributed transmission device for audio and video signals according to claim 1 is characterized in that: The audio and video signal input line (14) can use different types of audio and video signal input lines, such as SC optical fiber, 4K high-definition HDMI line, high-definition DVI line, 4K high-definition DP line, etc., according to different types of audio and video signal interfaces of the host computer (0); the audio and video signal output line (12) can use different types of audio and video signal output lines, such as SC optical fiber, 4K high-definition HDMI line, high-definition DVI line, 4K high-definition DP line, etc., according to different types of audio and video signal interfaces of the terminal display screen (8).

8. The long-distance lossless distributed transmission device for audio and video signals according to claim 3 is characterized in that: The video and audio signal receiving module (6) receives a video and audio signal sent by the 1-to-8 passive SC splitter (4) via the video and audio signal transmission medium - optical fiber (11), and outputs the signal to the video and audio signal conversion module (7); the video and audio signal conversion module (7) is used to decode the video and audio signal and convert it into a specific interface type signal that can be received by the terminal display screen (8), such as HDMI, DVI, DP; if the terminal display screen (8) can receive optical signals (SC), no conversion is required and the signal can be directly output.

9. The long-distance lossless distributed transmission device for audio and video signals according to claim 3 is characterized in that: The video and audio signal conversion module (7) further comprises a video and audio signal storage module (16); when the video and audio signal source input in the upper computer (0) is interrupted, or the video and audio signal sending host (1) fails, or the video and audio signal transmission medium - optical fiber (11) is damaged so that the video and audio signal receiving module (6) fails to receive external video and audio signals, the video and audio signal storage module (16) outputs the pre-stored video and audio signal source to the terminal display screen (8) to avoid the problem of a black screen on the terminal display screen.

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