CN203827477U - Audio and video synchronizing device and high-definition multimedia HDMI access apparatus - Google Patents
Audio and video synchronizing device and high-definition multimedia HDMI access apparatus Download PDFInfo
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- CN203827477U CN203827477U CN201420047850.2U CN201420047850U CN203827477U CN 203827477 U CN203827477 U CN 203827477U CN 201420047850 U CN201420047850 U CN 201420047850U CN 203827477 U CN203827477 U CN 203827477U
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Abstract
The utility model relates to the field of multimedia, and discloses an audio and video synchronizing device and a high-definition multimedia HDMI access apparatus. The audio and video synchronizing device comprises a video decoder, an audio frequency decoder, a time stamp controller and an audio and video synchronizer, wherein the time stamp controller is respectively connected with the video decoder and the audio frequency decoder, and is used for control and adjustment of time stamps of video data and audio data decoded by the video decoder and the audio frequency decoder. The video decoder and the audio frequency decoder are also connected with the audio and video synchronizer which synchronizes the video data and the audio frequency data output by the video decoder and the audio frequency decoder. The audio and video synchronizer is connected with the time stamp controller. The audio and video synchronizing device sends information feedback to the time stamp controller. According to the technical scheme, accurate synchronization of the audio and video data can be realized, and the audio and video audition experience for a user is improved.
Description
Technical field
The utility model relates to MultiMedia Field, particularly a kind of audio-visual synchronization device.
Background technology
Current, the development of multimedia technology is maked rapid progress, and multimedia technology, in the people's cultural life of enriching constantly, is also constantly pushed ahead along with the increase of demand.Along with the development of personal audio Entertainment equipment and large high-definition screen curtain LCD TV and universal, the application of high-definition multimedia HDMI access device that can realize the seamless link of multiple portable audio-visual and amusement equipment and large high-definition screen curtain LCD TV will be more and more extensive.
Between the related medias such as the audio frequency and video in multi-medium data and in Media Stream, conventionally exist stricter sequential relationship; after storage, processing and transmitting procedure; between media He in media, conventionally there will be the phenomenon that represents Time Inconsistency; affect user's audiovisual impression, Audio and Video be synchronously the important step that multimedia provides video capability.
Utility model content
In view of the above problems, the purpose of this utility model is to provide a kind of audio-visual synchronization device, can realize audio, video data precise synchronization, and the audio frequency and video audition that promotes user is experienced, and particularly can be used in the audio-visual synchronization of high-definition multimedia HDMI access device.
A kind of audio-visual synchronization device that the utility model embodiment provides, comprises Video Decoder, audio decoder, timestamp controller, audio-visual synchronization device, wherein,
Described timestamp controller is connected with described Video Decoder and audio decoder respectively, and the video data obtaining for described Video Decoder and audio decoder are decoded respectively and the timestamp of voice data are controlled adjustment,
Described Video Decoder and audio decoder are also connected with described audio-visual synchronization device respectively, and described audio-visual synchronization device is used for video data and the voice data of described Video Decoder and audio decoder output to carry out synchronously,
Described audio-visual synchronization device is connected with described timestamp controller, and described audio-visual synchronization device carries out information feedback to described timestamp controller.
Alternatively, also comprise demultiplexer, described demultiplexer is connected with described Video Decoder and audio decoder respectively, for data stream separation is obtained to video data stream and audio data stream, described video data stream and audio data stream are input to respectively described Video Decoder and audio decoder.
Alternatively, also comprise video output terminals, audio output,
Described video output terminals and audio output are connected with described audio-visual synchronization device respectively, for carrying out respectively video and audio frequency output.
The utility model also provides a kind of high-definition multimedia HDMI access device, comprises the audio-visual synchronization device described in any as above.
Therefore, application the present embodiment technical scheme, owing to by described timestamp controller, decode the respectively video data that obtains and the timestamp of voice data of described Video Decoder and audio decoder being controlled to adjustment, can realize audio, video data precise synchronization, the audio frequency and video audition that promotes user is experienced, and particularly can be used in the audio-visual synchronization of high-definition multimedia HDMI access device.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of audio-visual synchronization apparatus structure schematic diagram that Fig. 1 provides for the utility model;
The another kind of audio-visual synchronization apparatus structure schematic diagram that Fig. 2 provides for the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
embodiment 1:
The present embodiment provides a kind of audio-visual synchronization device, as shown in Figure 1, comprise Video Decoder 01, audio decoder 02, timestamp controller 03, audio-visual synchronization device 04, wherein, can be, but not limited to, also comprise demultiplexer, described demultiplexer is connected with described Video Decoder 01 and audio decoder 02 respectively, for data stream separation is obtained to video data stream and audio data stream, described video data stream and audio data stream are input to respectively described Video Decoder 01 and audio decoder 02.
Described Video Decoder 01 and audio decoder 02 are connected with described timestamp controller 03 respectively, and the video data obtaining by 03 pair of described Video Decoder 01 of timestamp controller and the separated decoding of audio decoder 02 and the timestamp of voice data are controlled adjustment.
Described Video Decoder 01 and audio decoder 02 are also connected with described audio-visual synchronization device 04 respectively, and described audio-visual synchronization device 04 is for carrying out synchronously video data and the voice data of described Video Decoder 01 and audio decoder 02 output.
Described audio-visual synchronization device 04 is connected with described timestamp controller 03, and 04 pair of timestamp controller of described audio-visual synchronization device 03 carries out information feedback.Described audio-visual synchronization device 04, according to the timestamp comparative result of video data and voice data, carries out information feedback to described timestamp controller 03.Institute's timestamp controller 03 receives the information feedback of the timestamp comparative result of audio-visual synchronization device 04.
Can be, but not limited to, also comprise video output terminals, audio output, described audio-visual synchronization device is connected with described video output terminals and audio output respectively, for carrying out respectively video and audio frequency output.
Therefore the described audio-visual synchronization device in the present embodiment can be realized audio, video data precise synchronization, the audio frequency and video audition that promotes user is experienced.
embodiment 2:
Between audio frequency and video, synchronously because the benchmark of time parameter reference is different, be divided into two kinds, a kind ofly take video as benchmark, audio logic data cell reference video frame, the mode by dropped audio data or repeat tone audio data reaches synchronous; Another kind is to take audio frequency as benchmark, by frame losing or the mode that repeats frame of video, reaches synchronous.Embedded system is more a lot of soon than the speed of processing video data stream at processing audio data stream, considers the finiteness of system resource and user's experience, and the present embodiment be take video and carried out simultaneous operation as benchmark.
As shown in Figure 2, multimedia data stream entering signal separator 05, through described demultiplexer 05, decomposite audio data stream and video data stream, audio stream enters audio decoder 02, video flowing enters Video Decoder 01, audio data stream and video data stream decoded in, the timestamp information of described audio data stream and video data stream is extracted, described audio-visual synchronization device 04 contrasts the timestamp information of described video data and voice data with reference to local clock, described audio-visual synchronization device 04 is according to comparative result, can show that whether audio frequency and video are synchronous, if different, also to revise through synchronous.Meanwhile, the information of timestamp comparison can feed back to timestamp controller 03, to realize the control adjustment to timestamp.Then carry out according to the order of sequence simultaneous display output, video data outputs to the display (screen buffer) of video output terminals 06, and voice data outputs to the audio system of audio output 07.
Timestamp simultaneous techniques refers to by timestamp and realizes a kind of technology synchronous between media.Timestamp is for synchronous temporal information, and its record can have multiple expression-form.Transmit leg is loaded in timestamp information in packet and transmits, and recipient carries out synchronously different objects according to timestamp.
embodiment 3:
In a kind of high-definition multimedia HDMI access device or other similar devices, comprise the audio-visual synchronization device providing as in embodiment 1 or embodiment 2.
Therefore, application the present embodiment technical scheme, a kind of high-definition multimedia HDMI access device can be realized audio, video data precise synchronization, and the audio frequency and video audition that promotes user is experienced.
Above-described execution mode, does not form the restriction to this technical scheme protection range.The modification of doing within any spirit at above-mentioned execution mode and principle, be equal to and replace and improvement etc., within all should being included in the protection range of this technical scheme.
Claims (4)
1. an audio-visual synchronization device, is characterized in that, comprises Video Decoder, audio decoder, timestamp controller, audio-visual synchronization device, wherein,
Described timestamp controller is connected with described Video Decoder and audio decoder respectively, and the video data obtaining for described Video Decoder and audio decoder are decoded respectively and the timestamp of voice data are controlled adjustment,
Described Video Decoder and audio decoder are also connected with described audio-visual synchronization device respectively, and described audio-visual synchronization device is used for video data and the voice data of described Video Decoder and audio decoder output to carry out synchronously,
Described audio-visual synchronization device is connected with described timestamp controller, and described audio-visual synchronization device carries out information feedback to described timestamp controller.
2. a kind of audio-visual synchronization device as claimed in claim 1, is characterized in that, also comprises demultiplexer,
Described demultiplexer is connected with described Video Decoder and audio decoder respectively, and for data stream separation being obtained to video data stream and audio data stream, described video data stream and audio data stream are input to respectively described Video Decoder and audio decoder.
3. a kind of audio-visual synchronization device as claimed in claim 1, is characterized in that, also comprises video output terminals, audio output,
Described video output terminals and audio output are connected with described audio-visual synchronization device respectively, for carrying out respectively video and audio frequency output.
4. a high-definition multimedia HDMI access device, is characterized in that, comprises as the audio-visual synchronization device as described in arbitrary in claims 1 to 3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420047850.2U CN203827477U (en) | 2014-01-24 | 2014-01-24 | Audio and video synchronizing device and high-definition multimedia HDMI access apparatus |
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| CN201420047850.2U CN203827477U (en) | 2014-01-24 | 2014-01-24 | Audio and video synchronizing device and high-definition multimedia HDMI access apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105898507A (en) * | 2016-05-30 | 2016-08-24 | 广东威创视讯科技股份有限公司 | Video signal synchronization method and device |
| CN107277614A (en) * | 2017-06-27 | 2017-10-20 | 深圳市爱培科技术股份有限公司 | Audio and video remote player method, storage device and the mobile terminal of drive recorder |
-
2014
- 2014-01-24 CN CN201420047850.2U patent/CN203827477U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105898507A (en) * | 2016-05-30 | 2016-08-24 | 广东威创视讯科技股份有限公司 | Video signal synchronization method and device |
| CN105898507B (en) * | 2016-05-30 | 2019-04-16 | 广东威创视讯科技股份有限公司 | A kind of vision signal synchronous method and device |
| CN107277614A (en) * | 2017-06-27 | 2017-10-20 | 深圳市爱培科技术股份有限公司 | Audio and video remote player method, storage device and the mobile terminal of drive recorder |
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Granted publication date: 20140910 Termination date: 20170124 |
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| CF01 | Termination of patent right due to non-payment of annual fee |