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Method and device for coding and decoding re-loss-free video

A video coding and coding technology, applied in the field of video compression coding and decoding systems

Inactive Publication Date: 2013-05-01
上海天荷电子信息有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0052] In order to solve this problem in the prior art of video encoding and decoding, the present invention proposes a method and device for lossless video encoding and decoding

Method used

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  • Method and device for coding and decoding re-loss-free video
  • Method and device for coding and decoding re-loss-free video
  • Method and device for coding and decoding re-loss-free video

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Experimental program
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Embodiment

[0106] Embodiment: H.264-based lossless video encoding device

[0107] This embodiment is a specific implementation of the no-reloss video encoding device shown in FIG. 7 , and the implementation of each module is as follows:

[0108] 1) Implementation of pixel input and calculation prediction error module: the pixels of the current coded macroblock are composed of 16x16 brightness Y pixels, 8x8 chroma U pixels and 8x8 chroma V pixels; each pixel is represented by an 8-bit binary number, and the dynamic range is 0~255 (including 0 and 255);

[0109] 2) Transform the implementation of the Tr module: the operation is the 4x4 integer discrete cosine transform (DCT) specified in the international standard H.264 for the transformation of Tr;

[0110] 3) Implementation of the Quantization Qu module: the quantization operation for Qu adopts the quantization operation specified in the international standard H.264, and has 52 quantization factors, which are called QP in H.264 and take...

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Abstract

The invention provides a method and a device for coding and decoding a re-loss-free video. The method and the device are implemented by three techniques: 1), recognizing a previous prediction mode and a previous quantized factor; 2) keeping a Q amplitude limit; and 3), keeping Q deblocking. In the method and the device, during the plurality of times of coding and decoding of the content of the multimedia video, the first time of coding causes loss, but the follow-up coding and decoding, no matter how many times, cause no loss of the content of the multimedia video as long as the compression ratio is no greater than that used at the first time, namely, from the second time, the decoded restored video image is completely consistent with the video image before coding without any loss accumulation, so the problems of information loss accumulation in the plurality of times of coding and decoding and increasingly deteriorated video quality are solved radically.

Description

technical field [0001] The invention relates to a video compression encoding and decoding system, in particular to a method and device for no-reloss video encoding and decoding. Background technique [0002] In the new era when the main form of information enters multimedia, especially "full high-definition digital video", the amount of data in the form of pixels of digital video signals is getting larger and larger. For example, Full HD (1080p60Hz) Deep Color digital video has a pixel rate of up to six gigabits per second (6Gbps). A 2-hour Full HD Deep Color digital video program requires 2700GB (gigabytes) of hard drive storage space. In order to efficiently transmit and store digital video signals, the data of the digital video signals must be compressed. Compression ratios are generally at least 10:1 and sometimes as high as 100:1. The compressed digital video data is called video code stream, code stream for short, and its data volume is only 10% or even 1% of the or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/32H04N19/176H04N19/61
Inventor 林涛
Owner 上海天荷电子信息有限公司