CN1492691A - Sound frequency error correcting method in one-way broadcast flow media transmission - Google Patents
Sound frequency error correcting method in one-way broadcast flow media transmission Download PDFInfo
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- CN1492691A CN1492691A CNA031146562A CN03114656A CN1492691A CN 1492691 A CN1492691 A CN 1492691A CN A031146562 A CNA031146562 A CN A031146562A CN 03114656 A CN03114656 A CN 03114656A CN 1492691 A CN1492691 A CN 1492691A
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- Detection And Prevention Of Errors In Transmission (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
This invention relates to a method for correcting mistakes in audio transfer occurring in single-way broadcast flow medium transfer including: 1) to separate audio flow and video flow of the medium flow at a broadcast end, 2) to duplicate audio flow 1 to get audio flow 2 to buffer the audio flow1 and video flow 1 to form a buffer audio and video flow at the same time broadcasting audio flow 2 directly, then to delay the broad cast of the result, 3) a receiving end receives audio 2 to buffer store it, 4) the receiving end receives audio flow and video flow 1 to be composed to a medium flow for broadcast, 5) to find out lost data from audio flow or is mistaken frames in step, 4)and repair them with data of audio flow2 in step 3).
Description
One, technical field
The present invention relates to a kind of audio error correction method, especially a kind of method that the audio transmission mistake that occurs in the transmission of One-to-All Broadcast Streaming Media is carried out error correction.
Two, background technology
One-to-All Broadcast Streaming Media transmission is meant in One-to-All Broadcast transmission channel transmission through the looking of ovennodulation, packets of audio data, and user side receives the looking of modulation, packets of audio data by the One-to-All Broadcast transmission channel, and it is carried out demodulation, reduction, broadcast.If certain strong interference that happens suddenly constantly causes some packet in the Streaming Media destroyed, so at receiving terminal, this Streaming Media just can't obtain continuous reduction, and break can appear in video and audio frequency.The pause of video shows as static picture, and the pause of audio frequency then shows as quiet.Owing to do not have reverse channel transmission in the One-to-All Broadcast Streaming Media transmission, the data that can only adopt the method for forward error correction to correct a mistake for packet are to improve the performance of transfer of data.Present error correction method can only carry out error correction to the voice data in the packet.
Three, summary of the invention
The invention provides a kind of method of correcting the error of transmission of One-to-All Broadcast Streaming Media transmission sound intermediate frequency, overcome the technical problem that audio frequency pauses preferably.
Technical solution of the present invention is: the present invention is the audio error correction method in a kind of One-to-All Broadcast Streaming Media transmission, and its special character is: this method comprises the following steps:
1) at the audio stream 1 and the video flowing 1 that broadcast end separated media stream;
2) audio stream 1 is duplicated obtain audio stream 2, when audio stream 2 is directly broadcasted, audio stream 1 and video flowing 1 are cushioned, form the audio stream and the video flowing of buffering, will cushion back audio stream 1 and video flowing 1 time-delay broadcast;
3) receiving terminal receives audio stream 2 and buffer memory;
4) receiving terminal receiver, video stream 1 and audio stream 1, synthetic Media Stream is play;
5) find out step 4) sound intermediate frequency stream 1 data of losing or erroneous frame, repair with the data of step 3) sound intermediate frequency stream 2.
Above-mentioned steps 2) audio stream 1 in after the buffering and the maximum duration of the delay time of video flowing 1 for correcting the audio frequency error code.
Because video in the files in stream media and audio frequency are the absolute coding transmission, and the video data volume is much larger than amount of audio data, therefore the present invention increased by one road voice data, and this voice data is transmitted in advance before the looking of Streaming Media, audio data coding transmission.When certain interference that happens suddenly strong constantly, still frame appears in video because of packet is destroyed, and audio frequency still keeps continuously because of pre-transmission.Therefore in advance the very little voice data of data volume is transmitted in advance, be used for the losing of flow compensated Media Stream sound intermediate frequency, and can be to the bigger burden of transmission channel increase.
Four, description of drawings
Accompanying drawing is the flow chart of specific embodiments of the invention.
Five, embodiment
Referring to accompanying drawing, before the files in stream media transmission in the One-to-All Broadcast transmission channel, at first Dynamic Separation goes out audio stream 1 and the video flowing 1 in the Streaming Media, be divided into two-way after then audio stream 1 being duplicated, one the tunnel synchronously puts into FIFO buffering coding pond (buffer value of supposing FIFO is 8000 milliseconds) with video flowing 1 cushions, the duplicated audio stream 2 in another road does not cushion.With the audio stream 1, video flowing 1 of buffering with without broadcasts of encode simultaneously of the audio stream 2 of buffering, so just obtained a combined-flow media data flow that voice data transmits in advance then.
At receiving terminal, needn't can decode video flowing 1 and audio stream 1 by buffered data, but through the powerful error correction to voice data has just been arranged after the certain hour delay.With the time mark in the video flowing 1, audio stream 1 of buffering and in advance the audio stream 2 that broadcasts of coding timestamp relatively, the audio stream of can recovered part losing, thus effectively guaranteed the continuity of audio frequency.
Claims (2)
1, the audio error correction method in a kind of One-to-All Broadcast Streaming Media transmission, it is characterized in that: this method comprises the following steps: successively
1) at the audio stream 1 and the video flowing 1 that broadcast end separated media stream;
2) audio stream 1 is duplicated obtain audio stream 2, when audio stream 2 is directly broadcasted, audio stream 1 and video flowing 1 are cushioned, form the audio stream and the video flowing of buffering, audio stream 1 after the buffering and video flowing 1 time-delay are broadcasted;
3) receiving terminal receives audio stream 2 and buffer memory;
4) receiving terminal receives audio stream 1 and video flowing 1, and synthetic Media Stream is play;
5) find out step 4) sound intermediate frequency stream 1 data of losing or erroneous frame, with the data modification of step 3) sound intermediate frequency stream 2.
2, the audio error correction method in the One-to-All Broadcast Streaming Media transmission according to claim 1 is characterized in that: audio stream 1 described step 2) after the buffering and the maximum duration of the delay time of video flowing 1 for correcting the audio frequency error code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03114656 CN1216499C (en) | 2003-04-18 | 2003-04-18 | Sound frequency error correcting method in one-way broadcast flow media transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03114656 CN1216499C (en) | 2003-04-18 | 2003-04-18 | Sound frequency error correcting method in one-way broadcast flow media transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1492691A true CN1492691A (en) | 2004-04-28 |
| CN1216499C CN1216499C (en) | 2005-08-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03114656 Expired - Fee Related CN1216499C (en) | 2003-04-18 | 2003-04-18 | Sound frequency error correcting method in one-way broadcast flow media transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1216499C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100571100C (en) * | 2006-08-01 | 2009-12-16 | 中国科学院声学研究所 | A kind of method of smoothing burst frame radio of IP media stream |
| CN101022548B (en) * | 2006-02-14 | 2010-04-14 | 三星电子株式会社 | Method for processing data in a terminal with digital broadcasting receiver |
| CN108847915A (en) * | 2018-05-29 | 2018-11-20 | 北京光润通科技发展有限公司 | The method for realizing one-way transmission using error correction coding reconstruct source data |
-
2003
- 2003-04-18 CN CN 03114656 patent/CN1216499C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022548B (en) * | 2006-02-14 | 2010-04-14 | 三星电子株式会社 | Method for processing data in a terminal with digital broadcasting receiver |
| CN100571100C (en) * | 2006-08-01 | 2009-12-16 | 中国科学院声学研究所 | A kind of method of smoothing burst frame radio of IP media stream |
| CN108847915A (en) * | 2018-05-29 | 2018-11-20 | 北京光润通科技发展有限公司 | The method for realizing one-way transmission using error correction coding reconstruct source data |
| CN108847915B (en) * | 2018-05-29 | 2020-11-24 | 北京光润通科技发展有限公司 | Method for realizing unidirectional transmission by reconstructing source end data by applying error correction coding technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1216499C (en) | 2005-08-24 |
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Granted publication date: 20050824 Termination date: 20130418 |