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Subband video decoding method and device

A technology of video coding and sub-band, applied in the direction of digital video signal modification, television, code conversion, etc.

Inactive Publication Date: 2005-09-07
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, all 3D subband solutions suffer from the following drawback: since the entire GOF is processed simultaneously, all images in the current GOF must be stored before spatiotemporal analysis and encoding
The same problem exists when decoding, that is, decoding all frames in a given GOF at the same time

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Embodiment Construction

[0022] As mentioned above, the number of frames that must be stored simultaneously is indeed an issue when dealing with the entire GOF, and may be a reason for preventing 3D subband solutions from being used as a standard. For example, for a GOF with a typical size of 16 frames, one has to simultaneously decode 16 subbands at the decoder side which simultaneously decodes all frames in said GOF, and store said 16 frames before playback. Also, as a real-time play, the 16 frames must be decoded before all previous GOF's frames are played. In fact, if N is the number of frames in a GOF, and M is the minimum number of frames that will be played in real time when decoding the next set of N frames, then the decoder needs to store ((2×N)+M) Store the frame.

[0023] The principle of the present invention then proposes a decoding method that realizes branch-to-branch reconstruction of the 3D structure instead of the simultaneous reconstruction of the entire tree as described: as shown...

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Abstract

The invention relates to a video decoding method for the decompression of an input coded bitstream corresponding to an original video sequence. The sequence has been divided into successive groups of frames (GOFs) and coded by means of a three-dimensional subband video coding method. According to the invention, the decoding method is iterative and comprises as many iterations as the number of couples of frames in each GOF, each iteration itself including, for the reconstruction of each successive couple of frames of each GOF, the sub-steps of decoding the coded bitstream that corresponds to the current GOF, storing, from the decoded bitstream thus obtained, only the data related to the current couple of frames and appropriate subbands containing some information on at least one frame of said current couple of frames, and, from said related data and said appropriate subbands, synthesizing the two frames of said current couple of frames.

Description

technical field [0001] The present invention generally relates to the field of video compression, and in particular, to a video decoding method for decompressing a coded bitstream corresponding to an original video sequence, which is divided into a plurality of consecutive groups of frames (GOFs), And this original video sequence is encoded by the three-dimensional sub-band video coding method, the method comprises the following steps: [0002] performing a temporal filtering step on each pair of consecutive frames in each GOF of the sequence, with or without motion compensation; [0003] performing a spatial analysis step on the filtered sequence; [0004] performing an entropy encoding step on the analyzed and filtered sequence, and if motion compensation is used, an entropy encoding step on the motion vector; [0005] An arithmetic coding step is performed on the coded sequence thus encoded, and said coded bit stream is output. [0006] The invention also relates to a de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/60G06T9/00H03M7/40H04N19/426H04N19/44H04N19/615H04N19/635H04N19/91
CPCH04N19/00781H04N19/00121H04N19/00818H04N19/00787H04N19/13H04N19/63H04N19/61H04N19/615H04N19/177H04N19/60
Inventor A·布尔热E·巴罗M·贝内蒂雷
Owner KONINK PHILIPS ELECTRONICS NV