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Method for hierarchically coding video images

A video image and image technology, applied in image communication, digital video signal modification, television, etc., can solve high cost and other problems

Inactive Publication Date: 2010-12-15
INTERDIGITAL VC HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the encoding of the complete high-resolution image (especially when the high-resolution image occupies a large amount of video area that is not shared with the low-resolution image) can be expensive

Method used

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  • Method for hierarchically coding video images
  • Method for hierarchically coding video images
  • Method for hierarchically coding video images

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Embodiment Construction

[0035] The data encoding method is a hierarchical encoding method, that is, the encoded data stream is constructed in a hierarchical manner, the data related to the lowest resolution format is concentrated in the bottom layer or the lower layer, and the additional data related to higher resolution images Concentrate on the upper level. At the level of the data stream, it is easy to select only the data relevant to the standard or format by selecting only the layers corresponding to the required resolution level. This involves spatial scalability, compatible with the arbitrary temporal scalability required by standards related to resolution formats.

[0036] The invention relates to encoding images of different unproportional formats in width and / or height and having a common video part. One of the formats has a lower resolution than the other. Said one format has a lower resolution, where for example the number of pixels in a line or the number of lines defines a lower commo...

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Abstract

The invention concerns a method for coding images (F1) and (F2) including the following steps: coding (2) the image (F2) of lower resolution to supply coded data to a base layer of the flow of coded data; zooming (3) (F2) to obtain a zoomed low-resolution image (Fz) of dimensions of those of (F1) for the common video part; coding (5) (F1) to supply coded data to an upper layer of coded data and using at least one of the following modes: interlayer predictive coding using a previous zoomed low resolution image as a prediction image wherein a predicted block and a motion vector defining said block are determined; interlayer predictive coding using a current zoomed low resolution image as a prediction image wherein a predicted block and a motion vector defining said block are determined.

Description

technical field [0001] The invention relates to a method and a device for hierarchical encoding and decoding of video images having different unscaled formats. The invention specifically relates to images having a common video portion. For example, the invention relates to the encoding of digital television signals in SD-standard-definition-format and high-definition-HD format. Background technique [0002] Video encoders with spatial scalability exist in the known art. The data stream produced by the video encoder has a scalable hierarchical structure, and the coded data is merged into a scalable stream in a hierarchical manner. The video formats involved with these encoders are formats where the high-resolution size is a multiple of 2 of the low-resolution size, which enables binary decomposition. Therefore, by subsampling and filtering high-resolution images, an encoding method compatible with the QCIF format (Quarter Common Intermediate Format) of size 176×144 and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/36H04N7/34H04N7/46H04N19/593
CPCH04N19/00763H04N19/00757H04N19/00818H04N19/63H04N19/593H04N19/59
Inventor 爱德华·弗朗索瓦丝格温埃利·马康热罗姆·维耶龙
Owner INTERDIGITAL VC HLDG INC