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Double-loop motion-compensation fine granular scalability

A two-way moving and scaling technology, applied in the field of video coding, can solve the problems of reduced utilization and image quality degradation

Inactive Publication Date: 2006-04-26
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The degradation in image quality is not due to the fine-grained scalable coding of the enhancement layer 12, but mainly due to the reduced utilization of temporal redundancy between FGS residual frames within the enhancement layer 12

Method used

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  • Double-loop motion-compensation fine granular scalability
  • Double-loop motion-compensation fine granular scalability
  • Double-loop motion-compensation fine granular scalability

Examples

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Embodiment Construction

[0024] Figure 3A An enhancement layer video coding scheme 30 according to a first exemplary embodiment of the present invention is shown. As can be seen, the video coding scheme 30 includes a prediction-based base layer 31 and a two-loop prediction-based enhancement layer 32 .

[0025] Prediction-based base layers 31 include intra-coded I-frames, inter-coded predictive P-frames, and inter-coded bidirectionally predictive B-frames, as in figure 1 as shown in the usual enhancement layer video scheme. The I-, P-, and B-frames of the base layer can be coded using conventional non-scalable frame-predictive coding techniques. (I-frames of the base layer are of course not motion-predicted).

[0026] The two-loop prediction-based enhancement layer 32 includes non-motion-predicted enhancement layer I- and P-frames and motion-predicted enhancement layer B-frames. Enhancement layer I- and P-frames for non-motion prediction are usually obtained by subtracting their respective reconstru...

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Abstract

A video coding technique with motion compensation within a fine-grain scalable coded enhancement layer. In one embodiment, the video coding technique includes a two-loop prediction-based enhancement layer comprising non-motion predicted enhancement layer I- and P-frames and motion predicted enhancement layer B-frames. The enhancement layer B-frames for motion prediction are computed using: 1) motion prediction from two temporally adjacent differential I- and P- or P- and P-frame residuals, and 2) residual The differential B-frame margin is obtained by subtracting the decoded base layer B-frame margin from the decoded base layer B-frame margin. In a second embodiment, the enhancement layer also includes motion-predicted enhancement layer P-frames. The enhancement layer P-frame for motion prediction is computed using: 1) the differential I- or P-frame residual from a temporal neighbor, and 2) by subtracting the decoded base layer P-frame residual from the original base layer P-frame residual Margin Gets the differential P-frame margin.

Description

technical field [0001] The present invention relates to video coding, and more particularly to a scalable enhancement layer video coding scheme for bidirectional predictive frames (B-frames) and predictive frames and bidirectional predictive frames and (P- and B- -frame) with motion compensation. Background technique [0002] Scalable enhancement layer video coding has been used to compress video signals transmitted over computer networks of varying bandwidth, such as the Internet. A typical current enhancement layer video coding scheme (adopted by the ISO MPEG-4 standard) using fine-grained scalable coding techniques is shown in figure 1 middle. As can be seen, the video coding scheme 10 comprises a prediction based base layer 11, at bit rate R BL encoding, and a FGS enhancement layer 12, press R EL coding. [0003] The prediction-based base layer 11 consists of: intra-coded I-frames; inter-coded P-frames, which are temporally predicted from previous I or P-frames usin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/50H04N7/26H04N7/46H04N7/36H04N19/34G06T9/00H04N7/32
CPCH04N19/31H04N19/34H04N19/61
Inventor M·范德沙尔H·拉达
Owner KONINKLIJKE PHILIPS ELECTRONICS NV