Compression techniques

Details Compression techniques Compression techniques

2003-01-27

2009-02-17

Philippe, Gims S (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240200

Reexamination Certificate

active

07492822

ABSTRACT:
In a video encoder a prediction signal at a bit resolution of P is subtracted from an input signal received at a bit resolution of P+Δ, where P is typically 8 bits, and P+Δ, 10 bits. A transform is then performed on the result, the output of which transform being at a bit resolution of at least P+Δ. The transformed signal is quantised, and the quantised signal used to form the prediction signal. The quantised signal is then coded for downstream delivery. At a decoder, the process is inverted, preserving the extra Δ bits input to the encoder.

REFERENCES:
patent: 5751359 (1998-05-01), Suzuki et al.
Erdem, et al., “Compression of 10-bit video using the tools of MPEG-2”, Signal Processing. Image Communication, Elsevier Science Publishers, Amsterdam. vol. 7, No. 1, Mar. 1, 1995. pp. 27-56.
Symes, Peter, “Ten-Bit Processing in an 8-Bit Environment”, SMPTE Journal. White Plains NY. No. 6, Jun. 1989. pp. 444-446.
PCT Search Report for Application WO 03/063491. Date of mailing: Aug. 25, 2003.

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