CN204305260U

CN204305260U - The television set of a kind of video and wireless sound box Audio Matching

Info

Publication number: CN204305260U
Application number: CN201420847205.9U
Authority: CN
Inventors: 洪益荣
Original assignee: TPV Display Technology Xiamen Co Ltd
Current assignee: TPV Display Technology Xiamen Co Ltd
Priority date: 2014-12-28
Filing date: 2014-12-28
Publication date: 2015-04-29
Anticipated expiration: 2024-12-28

Abstract

The utility model discloses the television set of a kind of video and wireless sound box Audio Matching, it comprises wireless signal transmission circuit, sound collection circuit, delay comparison circuit, cache control circuit and display circuit; Described cache control circuit comprises audio buffer circuit, video cache circuit and output control circuit, and audio buffer circuit is connected with tv audio output circuit and display circuit respectively with video cache circuit; Described sound collection circuit output end is connected with delay comparison circuit input, and described delay comparison circuit output is connected to described cache control circuit; Audio buffer circuit output end is connected with wireless signal transmission circuit and delay comparison circuit by output control circuit, and video cache circuit is connected with display circuit by output control circuit; The Voice & Video that television set exports is controlled to export external wireless audio amplifier and screen to by cache control circuit.This product can carry out video/audio simultaneously match expeditiously when the external wireless sound box of TV.

Description

The television set of a kind of video and wireless sound box Audio Matching

Technical field

The utility model relates to television set, the television set of especially a kind of video and wireless sound box Audio Matching.

Background technology

Along with the development of video coding and decoding technology, the video-audio program of high code check is on the increase, when these programs are play on a television set, the common audio amplifier that television set carries is difficult to the high-fidelity characteristic fully representing high code check source of sound, user to be everlasting on television set external speaker to obtain better audio frequency result of broadcast, wireless sound box in external speaker is subject to liking of a lot of user because installing facility, but because wireless transmission is affected by environment larger, wireless sound box is play certain delay usually, that causes between TV set image and sound is asynchronous, when the program of television for play fast moving scenes, this phenomenon will be more obvious.

Application number is disclose a kind of video-audio synchronization method in the patent application of 200580010894.1, the Delay time area of a room is determined with the time difference between relevant auditory event and visual event, but explicitly point out the method in its claim need carry out video identification and audio identification simultaneously, and this is by the load of increasing device computing circuit, be unfavorable for improving synchronous efficiency.

Summary of the invention

Synchronous for making television set can realize video/audio when external wireless sound box expeditiously, the utility model proposes the television set of a kind of video and wireless sound box Audio Matching.

The utility model uses following scheme:

A television set for video and wireless sound box Audio Matching, it comprises wireless signal transmission circuit, sound collection circuit, delay comparison circuit, cache control circuit and display circuit;

Described cache control circuit comprises audio buffer circuit, video cache circuit and output control circuit, and audio buffer circuit is connected with tv audio output circuit and display circuit respectively with video cache circuit;

Described sound collection circuit output end is connected with delay comparison circuit input, and described delay comparison circuit output is connected to described cache control circuit;

Audio buffer circuit output end is connected with wireless signal transmission circuit and delay comparison circuit by output control circuit, and video cache circuit is connected with display circuit by output control circuit;

The Voice & Video that television set exports is controlled to export external wireless audio amplifier and screen to by cache control circuit.

The wireless connections of described wireless signal transmission circuit are the one in bluetooth, Wifi, 3G or 4G wireless mode.

The utility model is in such scheme, television set carries out audio frequency delay calibration operation when wireless connections have been set up, first by wireless sound box playout-delay testing audio, by sound collection circuit, the delayed test audio frequency that wireless sound box is play is identified again, from the transmission of delayed test audio frequency with identify that the time difference of two steps show that wireless sound box postpones duration, then look out according to this Delay time and need carry out synchronous video frame number.When television set uses wireless sound box broadcast program, audio frequency send mode is constant, and the frame of video need carrying out matching treatment is cached in video cache circuit, cache control circuit takes out frame of video with the principle of first in first out and delivers to display circuit from video cache circuit, the time that frame of video is shown is later than wireless transmission time of audio signal, both time differences counteract the delay duration of wireless sound box, finally reach the effect that video/audio is synchronous.

The utility model scheme has following advantage:

1, the delay duration computational process of wireless sound box is only carried out for audio frequency link, and only calculates when the wireless connections of wireless sound box have been set up, and therefore operand is little, and efficiency is high, can not take TV set circuit resource too much.

2, use the time delay display of video cache circuit realiration frame of video, take this time delay of compensation wireless sound box to realize audio video synchronization, its process is simple, is easy to realize, and cost is low.

3, wireless sound box can be decided by the hardware configuration of video buffer and postpone scope, be convenient to factory settings time delay prompting, facilitate user to locate delay reason.

Accompanying drawing explanation

Below in conjunction with accompanying drawing to the further detailed description of the utility model:

Fig. 1 is the system architecture schematic diagram of the television set of a kind of video described in the utility model and wireless sound box Audio Matching.

Embodiment

As shown in Figure 1, the utility model comprises wireless signal transmission circuit 5, sound collection circuit 4, delay comparison circuit 3, cache control circuit 2 and display circuit 6;

Described cache control circuit 1 comprises audio buffer circuit 8, video cache circuit 1 and output control circuit 9, and audio buffer circuit 8 is connected with tv audio output circuit and display circuit 6 respectively with video cache circuit 1;

Described sound collection circuit 4 output is connected with delay comparison circuit 3 input, and described delay comparison circuit 3 output is connected to described cache control circuit 1;

Audio buffer circuit 8 output is connected with wireless signal transmission circuit 5 and delay comparison circuit 3 by output control circuit 9, and video cache circuit 1 is by being connected with display circuit 6 by output control circuit 9;

The Voice & Video that television set exports is controlled to export external wireless audio amplifier 7 and screen to by cache control circuit 1.

The wireless connections of described wireless signal transmission circuit 5 are the one in the wireless mode such as bluetooth, Wifi, 3G or 4G.

User carries out Bluetooth pairing wireless sound box 7 and television set described in the utility model, when successful matching, wireless connections between the wireless signal transmission circuit 5 of television set and wireless sound box 7 have been set up, television set recognizes wireless sound box 7 and it can be used as delayed test audio-frequence player device, through wireless signal transmission circuit 5 to wireless sound box 7 transmission lag test audio signal, after audio signal transmission terminates, described television set sends delay compare instruction to delay comparison circuit 3, audio collection instruction is sent to sound collection circuit 4, delay comparison circuit 3 is after receiving the delay compare instruction that cache control circuit 2 sends, start retardation ratio comparatively to work, and the command reception time as delayed test audio frequency transmitting time in order to calculate.

Sound collection circuit 4 is after receiving audio collection instruction, gather the audio frequency of wireless sound box 7, when gathered audio frequency meets delayed test audio frequency, audio frequency confirmation signal is sent to delay comparison circuit 3, delay comparison circuit 3 is after receiving the audio frequency confirmation signal that sound collection circuit 4 sends, record time of reception, and the response time of this time as wireless sound box 7, delay comparison circuit 3 calculates the difference of wireless sound box 7 response time and delayed test audio frequency transmitting time, by the delay duration of this difference as wireless sound box 7, send to cache control circuit 2.

Cache control circuit 2 is after the delay duration receiving delay comparison circuit 3 transmission, the video frame number needing buffer memory is calculated by the Signal aspects of TV machine, such as when the delay duration obtained is 250ms, and television set display is when being the signal of 60Hz, then need the video frame number of buffer memory for (250ms/1000)/(1/60Hz)=15, when namely showing again after display frame buffer memory 15 frame, picture will be also comparatively original in caching process delay 250ms, so just can holding tone video playback synchronous.

When television set uses wireless sound box broadcast program audio frequency, cache control circuit 2 receives the AV signal that peripheral circuit transmits, and by Different Strategies, AV signal is forwarded, audio signal is forwarded to wireless signal transmission circuit 5 immediately, be sent to wireless sound box 7 through wireless blue tooth connection to play, vision signal is then forwarded to video cache circuit 1, for buffer memory 15 frame picture during delay duration 250ms mentioned above, first cache control circuit 2 is set to 15 the buffer memory frame number of video cache circuit 1, then vision signal is forwarded to video cache circuit 1, when the video frame number in video cache circuit 1 is more than 15, cache control circuit 2 is by the principle of first in first out, the frame of video of buffer memory is at first taken out from video cache circuit 1, be forwarded to display circuit 6 in order to display.The now vision signal display of television set is delayed by 250ms, and its time of delay is equal with the time of delay of wireless sound box 7, compensate for the playout-delay of wireless sound box 7, can reach the effect that video/audio is synchronous.

Because the buffer memory of frame of video need take a large amount of memory headrooms, and the memory headroom of video cache circuit 1 is limited, therefore the audio-visual synchronization of this product just can only can reach better effects when wireless sound box 7 is no more than certain limit time of delay, when exceeding the audio-visual synchronization scope of this product the time of delay of wireless sound box 7, this product is handled as follows, for the maximum synchronization delayed time of this product for 250ms, when wireless sound box 7 be delayed over 250ms time, cache control circuit 2 sends signal to display circuit 6 and wireless signal transmission circuit 5, it is excessive that television set points out wireless sound box 7 to postpone to user, the buffer memory frame number that cache control circuit 2 arranges video cache circuit 1 by maximum synchronization delayed time is 15, arrange with this and playout-delay of wireless sound box 7 is carried out synchronously.

Claims

1. a television set for video and wireless sound box Audio Matching, is characterized in that: it comprises wireless signal transmission circuit, sound collection circuit, delay comparison circuit, cache control circuit and display circuit;

2. the television set of a kind of video according to claim 1 and wireless sound box Audio Matching, is characterized in that: the wireless connections of described wireless signal transmission circuit are the one in bluetooth, Wifi, 3G or 4G wireless mode.