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Scalable video coding with grid motion estimation and compensation

A technology for motion estimation and extended video, applied in the field of video coding, can solve the problems that company A is not the best, low bit rate, etc.

Inactive Publication Date: 2010-02-03
AGENCY FOR SCI TECH & RES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this example, a traditional video encoding system designed for optimal performance at the highest bit rate is not optimal for Company A because most of its customers are using lower bit rate services

Method used

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  • Scalable video coding with grid motion estimation and compensation
  • Scalable video coding with grid motion estimation and compensation
  • Scalable video coding with grid motion estimation and compensation

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[0131] The general application of the above process to the low latency case is described below. Initially, the bitstream is optimally generated for the low-latency case by seamless integration of motion compensated prediction and MCTF. Then in one embodiment by using the optimal parameter MCTF to generate the desired video sequence for the low-latency case.

[0132] For example, the input frame rate is 30HZ, and the frame size is 4CIF. The user wishes to optimize operation for QCIF-sized video sequences at 7.5HZ for low latency. In this instance, the encoder produces the desired picture for low-latency encoding: two rounds of temporal wavelet transform are performed on 4 consecutive original pictures to produce a video sequence with 4CIF size and 7.5HZ. Two rounds of 2D spatial wavelet transformation are then performed to generate the desired video sequence. The video sequence is then encoded using eg an H.264 encoder.

[0133] An enhancement layer bitstream is then gene...

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Abstract

A scalable coder having a grid motion estimation and compensation module (110), a motion compensation temporal filtering module (105), a scalable coding module (115), a discrete transformation module(120), and a packetization module (135). The grid-motion estimation and compensation module (110) outputs a scalable motion vector from the source video data, supplied resolution and bit rate parameters. The motion compensation temporal filtering module (105) generates, from the source video data and the scalable motion vector, a residual image corresponding to the difference between the present and previous image frames. The scalable coding module (115) is coupled to receive and encode the scalable motion vector. The discrete transformation module (120) is configured to receive and domain transform the supplied video to a sequence of coefficients. The packetization module is coupled to the scalable coding module (115) and the discrete transformation module (120), and is operable to combine the encoded scalable motion vector and the sequence of coefficients into a packet.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application 60 / 582,444, filed June 23, 2004, which is hereby incorporated by reference in its entirety for any purpose. technical field [0003] The present invention relates to video coding and in particular to scalable video coding in which motion estimation and compensation can be optimized as a function of desired bit rate range, frame rate and resolution. Background technique [0004] Three-dimensional sub-band wavelet coding has been proposed as a high-efficiency scalable video coding (SVC) technology in J. Ohm's "Three Dimensional Sub-band Coding with Motion Compensation", IEEE Trans. on Image Processing, Vol.3, No. 9, pp559-571, Sept 1994 describes its development. In this scheme, four kinds of redundancies are eliminated: temporal, spatial, perceptual and statistical. [0005] Temporal redundancy can be eliminated by performing open look based motion comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/36H04N19/94
CPCH04N19/00781H04N19/00121H04N19/00818H04N19/0063H04N19/00678H04N19/00448H04N19/00169H04N19/00787H04N19/13H04N19/63H04N19/61H04N19/146H04N19/523H04N19/57H04N19/36H04N19/615H04N19/51H04N19/30
Inventor 李正国杨小康林庆帆林晓S·拉哈尔贾潘峰
Owner AGENCY FOR SCI TECH & RES
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