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Video unit data loss processing algorithm

A technology of video unit and processing algorithm, applied in the field of video unit data loss processing algorithm, can solve problems such as video unit data error

Inactive Publication Date: 2011-03-30
HUANDA COMPUTER (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of video unit data loss processing algorithm, to solve when CMMB data adopts demultiplexing mode 1 in the prior art, if a section of video data is lost, all video unit data errors will be caused thereafter The problem

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Embodiment Construction

[0019] Such as figure 1 As shown, the video unit data loss processing algorithm of the present invention, the algorithm is implemented in six modules, the six modules include: retrieval module, verification module, search module, calculation module, comparison module, processing module, which includes Proceed as follows:

[0020] Step 101: According to the CMMB-GYT220.2 multiplexing protocol, the retrieval module obtains the inherent length of each subsequent video unit from the video segment header;

[0021] Step 102: The verification module verifies whether there is an error in the mth video unit at the current position, which is realized according to whether there is a corresponding synchronization header in the verification video, m is a natural number greater than or equal to 1, and if an error occurs, it is "Yes" Enter step 103; if no error occurs, then enter step 108 for "no";

[0022] Step 103: The search module reversely searches the previous video sync header i1 of...

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Abstract

The invention relates to a video unit data loss processing algorithm, which comprises the following steps of: obtaining the natural length of each video unit; verifying whether an error occurs in an mth video unit or not; searching a previous video synchronous head i1 of the mth video unit backward; searching a next video synchronous head i2 of the mth video unit forward; subtracting the position length of the video synchronous head i1 from the position length of the video synchronous head i2 to obtain the current length of the mth video unit; comparing whether the current length of the mth video unit is equal to the natural length of the mth video unit obtained by a capturing module; taking m+1 as a new m value and i2+1 as a new i2 value and jumping to the step 4; and copying video unit data at the current position to a buffer area to be decoded. The algorithm can solve the problem that: if a section of video data is lost when China mobile multimedia broadcasting (CMMB) data adopts a demultiplexing mode 1, errors can occur in all video unit data next to the CMMB data in the prior art.

Description

【Technical field】 [0001] The invention relates to a video unit data loss processing algorithm, in particular to a CMMBH.264 video unit data loss processing algorithm. 【Background technique】 [0002] CMMB (China Mobile Multimedia Broadcasting) is the first domestic self-developed system for various mobile terminals such as mobile phones, PDAs, MP3, MP4, digital cameras, and notebook computers. It uses S-band signals to achieve "world" integrated coverage , National roaming, support 25 sets of TV programs and 30 sets of radio programs, CMMB is China's completely self-developed mobile multimedia broadcasting system standard [standard number: CMMB GY / T 220.1 / 2006, GY / T 220.2 / 2006]. [0003] According to the CMMB-GYT220.2 multiplexing protocol, when CMMB data adopts demultiplexing mode 1, if a piece of data is lost, it will cause data errors in all subsequent video units. [0004] In view of this, the present invention proposes a data loss processing algorithm for video units. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/64H04N19/89
Inventor 余成龙
Owner HUANDA COMPUTER (SHANGHAI) CO LTD