Television – Bandwidth reduction system
Patent
1992-11-02
1994-09-06
Chin, Tommy P.
Television
Bandwidth reduction system
348390, 348394, 348395, 348400, H04N 712, H04N 7133, H04N 7137
Patent
active
053452682
ABSTRACT:
In digital video signals which differ in the number of pixels thereof, such as a standard video signal having a screen aspect ratio of 4:3 and a wide video signal having an aspect ratio of 16:9 the data quantity after encoding is equalized without increasing the compression ratio of the video signal having the larger number of pixels. An encoding apparatus performs intraframe encoding of the standard video signal so that the coded data quantity is constant in every frame, and interframe encoding of the wide video signal in each two frames so that the coded data quantity is constant in every two frames.
REFERENCES:
patent: 4884138 (1989-11-01), Storey
patent: 4901148 (1990-02-01), Nakayam et al.
patent: 4942465 (1990-07-01), Ohta
patent: 5185819 (1993-02-01), Ng et al.
IEEE Transactions on Consumer Electronics, vol. 37, No. 3, Aug., 1991, pp. 275-282, XPOOO263196; M. Yoneda et al., "An Experimental Digital VCR with New DCT-Based Bit-Rate Reduction Ssytem", *the whole document*.
Fernseh-Undo Kino-Technik, vol. 45, No. 10, 1991, Heidelberg, DE, pp. 524-527; XPOOO265565; J. Heitmann, "Wide Screen Recording", *the whole document*.
Awamoto Shigeru
Matsuta Toyohiko
Nishino Masakazu
Chin Tommy P.
Le Vu
Matsushita Electric - Industrial Co., Ltd.
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