Compression

Details Compression Compression

2006-08-01

2006-08-01

Lee, Young (Department: 2613)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

Reexamination Certificate

active

07085321

ABSTRACT:
The invention relates to a method of controlling decoder drift for memory compression comprising the steps of providing a decoded bit-stream output of a decoder (79) and a bit-stream input to an encoder (76) in a first pass of a coding loop, where the bit-stream input to the encoder (76) is based on the decoded bit-stream output of the decoder (79), determining a difference between the bit-stream input to the encoder (76) and the decoded bit-stream output of the decoder (79), where the difference is due to a compression of the decoded bit-stream output of the decoder (79) in the encoder (76) during the first coding loop and correcting the decoded bit-stream output of the decoder (79) in dependence on the determined difference in a second pass of the coding loop.

REFERENCES:
patent: 6005623 (1999-12-01), Takahashi et al.
Assuncao et al: Transcoding of MPEG-2 video in the frequency domain Acoustics, Speech, And Signal Proceedings, 1997. ICASSP-97., 1997 IEEE International Conference On Munich, Germany, pp. 2633-2636.
Kleihorst et al: “DCT-Domain Embedded Memory Compression For Hybrid Video Coders” Journal Of VLSI Signal Proceedings Systems For Signal. Image, And Video Technology, Kluwer Academic Publishers, Dordrecht, NL, vol. 24, No. 1, Feb. 2000, pp. 31-40.

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