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Method of video decoding

A video decoder and decoder technology, applied in the field of video decoding, to achieve the effect of efficient use

Inactive Publication Date: 2007-02-28
ENTROPIC COMM INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since data requests often consist of only a few bytes and the request is arranged to cover more than one data unit of the device, the device may have significant transfer overhead

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Embodiment Construction

[0037] Existing video decoders, such as video decoders configured to decode pictures encoded according to an existing MPEG standard, such as MPEG-4, are capable of decoding compressed video data based on the order in which the encoded pictures were received. This approach is generally expected to reduce memory storage requirements and enable a relatively simpler design of the decoder used. In addition, existing video decoders often use unified memory, such as static dynamic random access memory (SDRAM) combined with memory arbiters. Traditionally, reconstruction of predicted images is based on operations on data macroblocks. When processing such macroblocks, an image area corresponding to nxn pixels is typically retrieved from memory, where n is a positive integer.

[0038] The inventors have realized that such retrieval of image regions is an inefficient process because, due to data processing in memory, more data is frequently read from storage than is actually required for...

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Abstract

A method of decoding video data (ENC(VI)) in a video decoder (50) for regenerating sequence of images (VO) is described. The method involves arranging for the decoder (50) to include processing means (70) coupled to data memory (60). Moreover, the method involves: (a) receiving and then storing the video data (ENC(VI)) including anchor picture data; (b) processing the video data to generate luminance and chrominance block data; (c) processing the luminance and chrominance data to generate corresponding macroblock data (130); and (d) applying motion compensation to generate from the macroblock data (130) and one or more anchor pictures the sequence of decoded images (VO). The method applies the compensation such that the motion vectors derived from the macroblocks (130) used for reconstructing the sequence of images (VO) are analyzed and macroblocks accordingly sorted to provide for more efficient transfer of one or more video areas from one or more anchor pictures between the memory (60) and the processing means (70).

Description

field of invention [0001] The present invention relates to video decoding methods; in particular but not limitedly, the present invention relates to a video decoding method for decoding images encoded according to current standards, such as MPEG. Furthermore, the invention also relates to a device for implementing the decoding method. technical background [0002] The efficient organization of data memories in image processing devices is known. Such devices are used to process sequences of images, the data representing each image usually having a considerable amount of data. Image sequences are often compressed in coded form so that their corresponding data is not very large for storage on a data carrier, for example on an optically readable optical storage disc, such as DVD. However, the use of decoding requires storage and processing of encoded data to generate corresponding decoded image data, which often has very large data volumes, eg several megabytes of data per ima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26
CPCH04N19/44H04N7/26638H04N19/423H04N7/26335H04N19/20H04N7/26707
Inventor 翁诺·埃里恩伯格约翰内斯·Y.·齐克拉尔
Owner ENTROPIC COMM INC
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