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Method and apparatus to construct bi-directional predicted frames for temporal scalability

A bidirectional prediction and reference frame technology, applied in TV, electrical components, image communication, etc., can solve the problem that the chipset does not support B frame

Inactive Publication Date: 2012-07-04
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, chipsets developed according to these classes may not support B-frames

Method used

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  • Method and apparatus to construct bi-directional predicted frames for temporal scalability
  • Method and apparatus to construct bi-directional predicted frames for temporal scalability
  • Method and apparatus to construct bi-directional predicted frames for temporal scalability

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Embodiment Construction

[0022] The present invention describes a method, apparatus and system for providing scalable video coded data via bidirectional prediction based on a base layer non-scalable coding design with minimal changes to base layer software, firmware and hardware. The base layer motion compensation codec is capable of constructing forward predicted or backward predicted P-frames. Also, the base layer motion compensation codec can be modified to construct forward / backward predicted (or bidirectional) B-frames with minimal changes to base layer software, firmware, and hardware. The same elements used to decode P frames can be utilized sequentially to decode B frames with multiple references. P-frames can be included in the base layer of a Scalable Video Coding bitstream, and B-frames can be included in the enhancement layer of a Scalable Video Coding bitstream.

[0023] In the following description, specific details are given for a thorough understanding of the examples. However, it wi...

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Abstract

A method, apparatus and system for decoding a bi-directional picture predicted from two reference frames with a motion compensation codec that is capable of locating reference frame portions from only one reference frame at a time. Including locating a first reference frame portion from a first frame in a first pass, storing the first reference frame portion in memory; locating a second referenceframe portion from a second frame in a second pass, and combining the first reference frame portion and the second reference frame portion to form a bi-directionally predicted portion. Also, a methodand apparatus for restricting the encoding of a bi-directional picture predicted from two reference frames to be decoded by a motion compensation codec that is capable of locating reference frame portions from only one reference frame at a time and is capable of decoding a limited number of partitions for each macroblock.

Description

[0001] Priority claims under 35 U.S.C. §119 [0002] This patent application claims priority to Provisional Application No. 60 / 568,142, filed May 4, 2004, entitled "MATHOD AND APPARATUS TO IMPLEMENT B-FRAMES AND SCALABILITY," which is assigned to the assignee of this application , which is hereby incorporated by reference. technical field [0003] The present invention relates to a method and apparatus for encoding and decoding scalable video data to construct frames of an enhancement layer by efficiently reusing base layer modules. Background technique [0004] Due to the explosive growth and great success of Internet and wireless communications, as well as the increasing demand for multimedia services, streaming media on the Internet and mobile / wireless channels has attracted great attention. In a heterogeneous Internet Protocol (IP) network, a server provides video and it can stream to one or more clients. Wired connections include dial-up, ISDN, cable, xDSL, fiber opti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/46H04N7/12H04N7/36
CPCH04N19/00721H04N19/00533H04N19/00587H04N7/361H04N19/44H04N19/51H04N19/577H04N19/43
Inventor 维贾亚拉克施密·R·拉维德朗戈登·肯特·沃克
Owner QUALCOMM INC