Image data compression device and encoder

Details Image data compression device and encoder Image data compression device and encoder

2008-05-06

2008-05-06

Tran, Phuoc (Department: 2624)

Image analysis

Image compression or coding

Adaptive coding

C382S251000, C382S250000

Reexamination Certificate

active

10981674

ABSTRACT:
An image data compression device including: a quantization section which quantizes image data; a FIFO buffer section which buffers quantized data for N frames (N is an integer greater than one) from the quantization section; an encoded data generation section which reads the quantized data from the FIFO buffer section asynchronously from writing into the FIFO buffer section, and generates encoded data; and a rate control section which changes a quantization step of the quantization section by using the data size of the encoded data. The rate control section calculates a quantization parameter to be equal to or less than an upper threshold of the quantization parameter or to be equal to or greater than a lower threshold of the quantization parameter by using an average data size of the encoded data for preceding N frames.

REFERENCES:
patent: 5253078 (1993-10-01), Balkanski et al.
patent: 5760836 (1998-06-01), Greenfield et al.
patent: 5963673 (1999-10-01), Kodama et al.
patent: A 07-023385 (1995-01-01), None
patent: A 11-122623 (1999-04-01), None
patent: A 2001-008215 (2001-01-01), None
patent: A 2001-025016 (2001-01-01), None
Okubo, T., et al.; (1997); “A Hardward/Software Co-design for Real-Time MPEG2 LSIs”; NTT R&D, col. 46, No. 6; pp. 609-614.
U.S. Appl. No. 10/981,725, filed Nov. 5, 2004, Kondo et al.
U.S. Appl. No. 10/851,334, filed May 24, 2004, Kondo et al.
U.S. Appl. No. 10/847,612, filed May 18, 2004, Kondo et al.
U.S. Appl. No. 10/981,690, filed Nov. 5, 2004, Kondo et al.
U.S. Appl. No. 10/981,633, filed Nov. 5, 2004, Kondo et al.
Annex L, “Rate Control,” ISO/IEC 14496-2; 1999(E), pp. 311-321.

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