Transcoder and method of transcoding

Details Transcoder and method of transcoding Transcoder and method of transcoding

2007-07-17

2007-07-17

Philippe, Gims (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240120, C382S236000

Reexamination Certificate

active

10320528

ABSTRACT:
A transcoder and a method of transcoding which reduces computational requirements without picture deterioration. A mode decision unit decides a mode of a scaled output macro block based on an area of the scaled macro block overlapped with a non-scaled macro block of a reference frame and a mode of the overlapped macro block. A motion vector decision unit decides a reference motion vector of the output macro block based on a motion vector with respect to the overlapped macro blocks. A picture quality preference mode selection unit receives a user picture quality preference command. A motion vector compensation unit compensates the motion vector of the output macro block based on the decided reference motion vector and the picture quality preference command.

REFERENCES:
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patent: 6058143 (2000-05-01), Golin
patent: 6434196 (2002-08-01), Sethuraman et al.
patent: 6993075 (2006-01-01), Kim et al.
patent: 2003/0009764 (2003-01-01), Krishnamachari
patent: 2003/0081676 (2003-05-01), Lin et al.

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