Television – Bandwidth reduction system – Data rate reduction
Patent
1996-08-09
1999-07-20
Britton, Howard
Television
Bandwidth reduction system
Data rate reduction
348414, 382253, H04N 728
Patent
active
059262265
ABSTRACT:
A method and an apparatus for encoding an image signal. The apparatus includes an acquisition module disposed to receive the image signal. A first processor is coupled to the acquisition module. At least one encoder processor is coupled to the first processor. The at least one encoder processor produces an encoded image signal under control of the first processor. The method includes the steps of converting an input image signal into a predetermined digital format and transferring the digital format image signal to at least one encoder processor. The method further includes the step of applying, at the at least one encoder processor, a hierarchical vector quantization compression algorithm to the digitized image signal. At the next step, a resultant encoded bit stream generated by the application of the algorithm is collected. The method and apparatus of the present invention may be used in conjunction with an ordinary modem to transmit and/or receive audio, video sequences or still images.
REFERENCES:
patent: 4809067 (1989-02-01), Kikuchi et al.
patent: 5121448 (1992-06-01), Katayama et al.
patent: 5444489 (1995-08-01), Truong et al.
patent: 5450132 (1995-09-01), Harris et al.
patent: 5457495 (1995-10-01), Hartung
patent: 5602589 (1997-02-01), Vishwanath et al.
patent: 5612747 (1997-03-01), Hartung et al.
patent: 5649030 (1997-07-01), Normile et al.
patent: 5831678 (1998-11-01), Proctor
"Video Demystified: A Handbook For The Digital Engineer"--Keith Jack--High Text Publications, Inc., 1993, Chapters 2 and 3.
"Adaptive hierarchical vector quantization for image coding: new results"--S. Zhong, F. Chin and Q.Y. Shi--Optical Engineering, Oct. 1995, vol. 34, pp. 2912-2917.
"Fast feature-based vector quantization algorithm of image coding"--Yih-Chuan Lin and Shen-Chuan Tai--Optical Engineering, Oct. 1995, vol. 34, pp. 2918-2926.
"Digital Image Compression Techniques"--Majid Rabbani and Paul W. Jones (Eastman Kodak Company)--SPIE Optical Engineering Press, 1991--Tutorial Texts, vol. TT7--Chapters 2,3,4,5,7,9,12 and 14.
"Image Coding Using Vector Quantization: A review"--Nasser M. Nasrabadi and Robert A. Kind--IEEE Transactions on Communications, vol. 36, No. 8, Aug. 1988.
"Two-Dimensional Signal and Image Processing"--Jae S. Lim--Chapters 8,9 and 10, Prentice Hall, 1990.
"JPEG Still Image Data Compression Standard"--William B. Pennebaker--Chapters 5 and 11--Van Nostrand Reinhold,1993.
"An Adaptive Vector Quantizer Based on the Gold-Washing Method for Image Compression"--Oscal T.-C. Chen, Bing J. Sheu and Zhen Zhang--IEEE Transactions on Circuits and Systems for Video Technology--vol. 4, No. 2, Apr.,1994.
"Dynamic Finite-State Vector Quantization of Digital Images"--Nasser M. Nasrabadi, Chang Y. Choo and Yushu Feng--IEEE Transactions on Communications--vol. 42, No. 5, May 1994.
Hodges Chris J. M.
Proctor John J.
Richardson Craig H.
Smith David L.
Truong Kwan K.
Boehnen McDonnell
Britton Howard
Le Vu
U.S. Robotics Access Corp.
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