Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2005-09-27
2005-09-27
Wong, Allen (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240000, C375S240010, C375S240020, C375S240030, C375S240120
Reexamination Certificate
active
06950468
ABSTRACT:
The invention provides an image information conversion apparatus and method by which picture quality deterioration caused by setting of an initial value can be prevented when code amount control in MPEG4 image coding is performed based on information extracted from MPEG2 image compression information. An initial reference quantization scale determination section determines an initial value for a reference quantization scale from predetermined MPEG2 image compression information, the number of macro blocks to be included in an MPEG4 bit stream, a code amount allocated to the first I picture of the MPEG2 image compression information stored in an information buffer, an average quantization scale and a target code amount for the first I-VOP of the MPEG4 bit stream calculated by an MPEG4 image information coding section, and then calculates an initial value for a virtual buffer occupation amount based on the determined initial value for the reference quantization scale.
REFERENCES:
patent: 6085223 (2000-07-01), Carino et al.
patent: 6480539 (2002-11-01), Ramaswamy
patent: 6647061 (2003-11-01), Panusopone et al.
patent: 6651072 (2003-11-01), Carino et al.
patent: 6674911 (2004-01-01), Pearlman et al.
Wee, Susie et al. “Field-To-Frame Transcoding with Spatial and Temporal Downsampling” IEEE International Conference on Image Processing, Kobe, Japan Oct. 1999.
Satoh Kazushi
Suzuki Teruhiko
Takahashi Kuniaki
Yagasaki Yoichi
Kananen Ronald P.
Rader & Fishman & Grauer, PLLC
Sony Corporation
Wong Allen
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