Unlock instant, AI-driven research and patent intelligence for your innovation.

Methodfor converting video code stream from H. 264 to AVS and device thereof

A code stream conversion and code stream technology, which is applied in the field of multimedia communication and video transmission, can solve the problems of high patent fees and restrictions on the development of video technology in China, and achieve the effect of fast conversion and avoiding complex calculations

Active Publication Date: 2011-06-08
深圳市铁越电气有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to historical reasons, video codec algorithm standards have always been in the hands of a small number of foreign manufacturers. For example, the most widely used H.264 video codec algorithm in digital remote viewing systems is the patent represented by Europe, America, Japan and South Korea. These patent manufacturers have achieved the purpose of restricting the development of China's video technology by charging high patent fees

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Methodfor converting video code stream from H. 264 to AVS and device thereof
  • Methodfor converting video code stream from H. 264 to AVS and device thereof
  • Methodfor converting video code stream from H. 264 to AVS and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] The technical solutions of the present invention will be described in detail below in conjunction with specific embodiments of the present invention.

[0046] Both H.264 and AVS are block-based transform and predictive hybrid coding algorithms, and the basic structures of the two encoders are similar (such as figure 1 ), and its technical characteristics are compared in Table 1.

[0047] Table 1

[0048] technology module

AVS-P2

H.264

intra prediction

Based on 8×8 blocks, 5 luma prediction modes, 4

chroma prediction mode 9 kinds of 4×4 brightness block modes, 4 kinds of 16×16 brightness blocks

Mode, 4 8×8 chroma block modes Multiple Reference Frame Prediction

up to 2 frames

Up to 16 frames complex buffer management mechanism

Variable block size motion compensation

16×16, 16×8, 8×16, 8×8 blocks

dynamic search 16×16, 16×8, 8*16, 8*8, 8*4, 4×8, 4×4

block motion search B-frame macroblock symmetric mode

...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for converting video code stream from H. 264 to AVS, which is characterized in that the implementation process comprises the following steps: step 1, uncompressing H. 264 code stream to obtain H. 264 code stream data; step 2, processing the H. 264 code stream data to obtain high-level grammatical structure framework of AVS output code stream, frame sequence I of the AVS output code stream, P frame sequence of the AVS output code stream and B frame sequence of the AVS output code stream; step 3, carrying out overall and quick transcoding processing on the H. 264 code stream data to obtain the AVS output code stream. Based on quick cascade H. 264 to AVS transcoding strategy of a pixel area, image information reusing mode, QP mapping method and motion vector mapping method, the invention avoids the complex computation with large computation workload and is applicable to the application requirement of high definition and real time transcoding. The invention also discloses a device for converting video code stream from H. 264 to AVS.

Description

technical field [0001] The invention belongs to the technical field of multimedia communication and video transmission, and in particular relates to a video format conversion method between H.264 format and AVS format. Background technique [0002] H.264 is a new-generation video coding standard developed by the Joint Video Team (JVT: JOINT VIDEO TEAM) of ITU-T's VCEG (Video Coding Experts Group) and ISO / IEC's MPEG (Moving Picture Coding Experts Group). -T's H.264, which is also part 10 of ISO / IEC's MPEG-4. Drafts were collected in 1998, and officially became an international standard in 2003. H.264 adopts a number of new technologies, such as unified VLC symbol coding, high-precision, multi-mode displacement estimation, integer transformation based on 4×4 blocks, and layered coding syntax. These measures enable the H.264 algorithm to have high coding efficiency. Under the same reconstructed image quality, the video compression ratio of H.263 or MPEG-2 can be doubled, or t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/50H04N7/26H04N19/157H04N19/176H04N19/40H04N19/513H04N19/70
Inventor 曾庆好张德雷
Owner 深圳市铁越电气有限公司