Television – Miscellaneous
Patent
1997-03-26
2000-01-11
Britton, Howard
Television
Miscellaneous
3488452, 348699, 382236, G06T 720, H04N 750
Patent
active
060141867
ABSTRACT:
A high-speed motion vector decoding circuit which decodes a motion vector formatted according to the MPEG-2 standard. The motion vector decoding circuit implements a motion vector decoding method on dedicated hardware including a pipeline structure. The hardware includes a parameter store for storing the input motion vector decoding parameters, that is, a motion vector range determination code, a motion vector code, and a motion vector residual code. The hardware also includes a motion vector decoder for storing motion vector to be decoded as a previous motion vector and decoding the motion vector using the parameter stored in the parameter store and the previous motion vector, a dual primer for receiving the previous motion vector stored in the motion vector decoder and generating a predetermined number of dual motion vectors, and a motion vector controller for controlling the operations of the decoder via the input parameters, and selecting and outputting the previous motion vector or the dual motion vector, as a finally decoded motion vector. A six-clock period of time is needed to decode one motion vector, and a 6+(n-1)-clock period of time is needed to decode n motion vectors via the pipeline structure, which enables the decoding circuit to be applied to a high-speed system such as a high-definition television.
REFERENCES:
patent: 5428396 (1995-06-01), Yagasaki et al.
patent: 5671024 (1997-09-01), Chun
International Standards Organization: "ISO/IEC CD 13818-2: Information Technology--Genetic coding of moving pictures and associated audio information-Part 2: Video" Dec. 1, 1993, Tokyo Japan XP002101939.
Ishihara K et al: "A Half-Pel Precision MPEG2 Motion-Estimation Processor with Concurrent Three-Vector Search" IEEE Journal of Solid-State Circuits, vol. 30, No. 12, Dec. 1, 1995, pp. 1502-1508, XP000557256.
Britton Howard
Samsung Electronics Co,. Ltd.
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