Television signal processing apparatus

Details Television signal processing apparatus Television signal processing apparatus

1991-04-12

1992-08-25

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 1100

Patent

active

051423537

ABSTRACT:
A television signal processor which is compatible with the existing television systems and is capable of producing television signals having a larger aspect ratio than the standard aspect ratio has an arrangement such that, at the transmission side, a main signal and a multiplex signal are produced from an electrical signal obtained by receiving an original image through processes such as time-axis compression, time-axis expansion, and chrominance signal processing, and are subjected to non-time-axis multiplexing. The processor has a further arrangement such that, at the reception side, there are provided a circuit for separating the non-time-axis multiplexed signal, a circuit for separating a luminance signal and a chrominance signal, a circuit for demodulating the chrominance signal, a circuit for effecting time-axis compression, a circuit for time-axis expanding the time-axis multiplexed signal, and a circuit for time-axis compressing the non-time-axis multiplexed signal. A receiver provided with this processor may receive images broadcast under the existing television systems without troubles and also may reproduce TV images with a larger aspect ratio than the conventional 4:3 aspect ratio by the application of synchronous detection, time-axis compression, time-axis expansion, etc.

REFERENCES:
patent: 4551754 (1985-11-01), Meise et al.
patent: 4839720 (1989-06-01), Isnardi
patent: 4855824 (1989-08-01), Fuhrer
patent: 4884127 (1989-11-01), Isnardi et al.
Yasumoto et al., An Extended Television System Using Quadrature Modulation of the Video Carrier with Inverse Nyquist Filter, IEEE Transactions on Consumer Electronics, vol. CE-33, No. 3, Aug. 1987, pp. 173-180.
Isnardi et al., A Single Channel NTSC Compatible Widescreen EDTV System, HDTV Colloquium Ottawa Canada 4-8 Oct. 1987.
Yasumoto et al., A Fully Compatible Extended Definition Television System Capable of Increasing the Aspect Ratio, 16th BTA 24 Feb. 1987.
"Encoding for Compatibility and Recoverability in the ACTV System", Isnardi et al.: IEEE Transactions on Broadcasting, vol. BC-33, No. 4, Dec. 1987, pp. 116-123.
"Decoding Issues in the ACTV System", Isnardi et al.; IEEE Transactions on Consumer Electronics, vol. 34, No. 1, Feb. 1988, pp. 111-120.

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