Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2007-01-30
2007-01-30
Dastouri, Mehrdad (Department: 2621)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
Reexamination Certificate
active
09934975
ABSTRACT:
The present invention discloses a system and method for rate control of MPEG video streams to achieve a target bit rate in a transcoder at the best visual quality possible. The invention monitors video buffer fullness for selecting the amount of rate reduction necessary to achieve a target bit rate. The invention also utilizes a method for selective requantization of DCT coefficients to assure visual quality.
REFERENCES:
patent: 5493456 (1996-02-01), Augenbraun et al.
patent: 5570197 (1996-10-01), Boon
patent: 5751701 (1998-05-01), Langberg et al.
patent: 5754235 (1998-05-01), Urano et al.
patent: 5812786 (1998-09-01), Seazholtz et al.
patent: 6026097 (2000-02-01), Voois et al.
patent: 6181711 (2001-01-01), Zhang et al.
patent: 6208688 (2001-03-01), Seo et al.
patent: 6226326 (2001-05-01), Mihara
patent: 6310915 (2001-10-01), Wells et al.
patent: 6441754 (2002-08-01), Wang et al.
patent: 6587508 (2003-07-01), Hanamura et al.
patent: 6904094 (2005-06-01), Liu et al.
patent: 2001/0008544 (2001-07-01), Ishiyama
patent: 0 103 438 (1986-07-01), None
patent: 2 061 581 (1981-05-01), None
patent: 2 118 750 (1983-11-01), None
patent: 2 286 277 (1995-08-01), None
patent: 2 288 044 (1995-10-01), None
patent: 1 523 753 (1978-09-01), None
patent: WO 87/06416 (1987-10-01), None
A.R. Reibman, B.G. Haskell, “Constraints on Variable Bit-Rate Video for ATM Networks”, IEEE Transactions on Circuit and Systems for Video Technology, vol. 2, No. 4, Dec. 1992, pp. 361-372.
G. Keesman, R. Hellinghuizen, F. Hoeksema, G. Heideman, “Transcoding of MPEG bitstreams”, Signal Processing: Image Communication, vol. 8 (1996), pp. 481-500.
J. Lee and B.W. Dickinson,Scene-Adaptive Motion Interpolation Structures Based on Temporal Masking in Human Visual Perception, in Proc. SPIE Conf. Visual Communication and Image Processing, Cambridge, Nov. 1993, pp. 499-510.
J. Lee and B.W. Dickinson,Adaptive Frame Type Selection for Low Bit-Rate Video Coding, in Proc. SPIE Conf. Visual Communication and Image Processing, Chicago, IL, Sep. 1994, pp. 1411-1422.
A.Y. Lan, A.G. Nguyen and J.N. Hwang,Scene-Content-Dependent Reference-Frame Placement for MPEG Video Coding, IEEE Trans. Circuits and Systems Video Technol., vol. 9, No. 3, pp. 478-89, 1999.
A. Yoneyama, Y. Nakajima, H. Yanagihara and M. Sugano,MPEG Encoding Algorithm with Scene Adaptive Dynamic GOP Structure, IEEE Third International Workshop on Multimedia Signal Processing, pp. 297-302, 1999.
ISO/IEPInformation Technology-Generic Coing Of Moving Pictures And Associated Audio Information: Video, ISO.IEC 13818-2, 1995, 209 pages.
Cote Guy
Gallant Michael
Winger Lowell
Beyer Weaver & Thomas LLP
Cisco Systems Canada Co.
Czekaj Dave
Dastouri Mehrdad
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