Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2006-07-04
2006-07-04
Le, Vu (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240160
Reexamination Certificate
active
07072402
ABSTRACT:
The present invention provides methods and apparatus for dynamically adjusting f-codes for a digital picture header of a coded picture. A video encoder having at least one motion estimation stages is provided for encoding the current picture. Motion vectors are determined for one motion estimation stage of the encoder. The motion vectors are analyzed to determine a maximum motion vector range for the picture. A corresponding minimum f-code is determined for the maximum range. The minimum f-code is then inserted into the digital picture header. In this manner, the f-codes carried in the digital picture header can be reduced to the minimum required value, thus reducing the number of bits needed to encode the f-codes.
REFERENCES:
patent: 6724821 (2004-04-01), Sawada
patent: 2003/0133512 (2003-07-01), Moni et al.
patent: 2003/0190059 (2003-10-01), Piccinelli et al.
patent: 2003/0202604 (2003-10-01), Brightwell et al.
“Generic Coding of Moving Pictures and Associated Audio: Recommendation H.262”, ISO/IEC JTC1/SC29/WG11 NO702, Mar. 25, 1994, pp. 83-85 (4 pages).
“Coding Representation of Picture and Audio Information: Test Model 5”, ISO/IEC JTC1/SC29/WG11 MPEG93/457, Apr. 1993, pp. 39-41 and 70 (5 pages).
Nemiroff Robert S.
Wu Siu-Wai
Cullen Lawrence T.
General Instrument Corporation
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