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Method of rate control, video frame encoder and frame compression system thereof

A rate control and compression system technology, applied in the direction of digital video signal modification, pulse modulation TV signal transmission, television, etc., can solve the problems of inability to perform random access, inability to precisely control the compression ratio, etc., to achieve the effect of effective utilization

Inactive Publication Date: 2009-09-23
MEDIATEK INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, one of the objectives of the present invention is to provide a ratio control method and related devices for video frame compression, so as to solve the problems of inability to precisely control the compression ratio and inability to perform random access.

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  • Method of rate control, video frame encoder and frame compression system thereof
  • Method of rate control, video frame encoder and frame compression system thereof
  • Method of rate control, video frame encoder and frame compression system thereof

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Embodiment Construction

[0013] In this specification and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use The difference in name is used as a way to distinguish components, but the difference in function of components is used as a criterion for distinction. The "comprising" mentioned in the entire specification and claims is an open term, so it should be interpreted as "Including but not limited to", in addition, the term "coupling" here includes any direct and indirect electrical connection means, therefore, if it is described in the text that the first device is coupled to the second device, it means that the first device can directly and electrically Connect to the second device, or indirectly electrically connect to the second device through other devices or connection means.

[0014] The present invention will becom...

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Abstract

This invention provides a video frame encoder, comprising: a segment unit, segmenting a video frame into a plurality of frame segments; a data compressing module, coupled to the segment unit, compressing a frame segment according to a plurality of compression rates to generate a plurality of coded outputs respectively corresponding to the plurality of compression rates; a selecting module, coupled to the data compressing module, selecting an actual coded output from the plurality of coded outputs based on a target rate; and a packing unit, coupled to the selecting module, packing the actual coded output to generate compressed data. The video frame encoder provided by this invention controls the compression ratio to realize the random access, thereby allowing the part update of the video frame and realizing the effective utilization of the memory.

Description

technical field [0001] The invention relates to video frame compression, in particular to a frame buffer compression ratio control method and device thereof. Background technique [0002] In order to meet the ever-increasing demands of display technology, high-resolution (high-resolution) and high-color (high-color) liquid crystal displays (Liquid Crystal Display, hereinafter referred to as LCD) have been widely used in the field of televisions. In general, frame buffers for storing images to be displayed on high resolution and high color LCDs require high activities frame buffer accesses. And this kind of highly active access operation will occupy a large amount of bandwidth, cause huge power consumption and shorten the service life of the battery. Therefore, data stored in the frame buffer needs to be compressed. According to existing compression rules, such as lossless compression LZW (Lempel-Zif-Welsh) or LZ77, lossy compression JPEG (Joint Photographic Experts Group, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/94
CPCH04N19/00121H04N7/26079H04N19/00521H04N19/00187H04N7/26106H04N19/00569H04N7/2618H04N7/32H04N7/3022H04N19/0009H04N19/50H04N19/13H04N19/15H04N19/124H04N19/436
Inventor 叶松宏
Owner MEDIATEK INC
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