초록 ▼

Embodiments of the present invention provide a coding system that codes data according to a pair of coding chains. A first coding chain generates coded video data that can be decoded by itself to represent a source video sequence of a small size, such as a size sufficient to support the real time pl

Embodiments of the present invention provide a coding system that codes data according to a pair of coding chains. A first coding chain generates coded video data that can be decoded by itself to represent a source video sequence of a small size, such as a size sufficient to support the real time playback and display features of a video editing application. The second coding chain generates coded video data representing supplementary data, which when decoded in conjunction with the coded video data of the first coding chain, yields the source video sequence for full-size display. The output of the first coding chain may be stored in memory in a file structure that can be accessed independently of the second chain's output and, therefore, it facilitates real time decoding and playback.

대표청구항 ▼

The invention claimed is: 1. A video coding system, comprising:at least one processor, wherein the at least one processor is configured to include a transform unit to code pixel data of a plurality of blocks as transform coefficients,a splitter to generate, from each block, a first sub-block includi

The invention claimed is: 1. A video coding system, comprising:at least one processor, wherein the at least one processor is configured to include a transform unit to code pixel data of a plurality of blocks as transform coefficients,a splitter to generate, from each block, a first sub-block including a preselected number of low frequency transform coefficients and a second sub-block including remaining transform coefficients, andrun length encoders for each of the first and second sub-blocks,wherein, for the low frequency sub-blocks, the run length encoder codes a pair of low frequency sub-blocks according to a scan pattern that:progresses across a first of the low frequency sub-blocks in a zig-zag from a lowest frequency coefficient to a highest frequency coefficient therein,advances to a highest frequency coefficient of a second low frequency sub-block, andprogresses across the second low-frequency sub-block from the highest frequency coefficient to the lowest frequency coefficient in a zig-zag.