论文信息 - NTSC Compatible Wide-Screen TV System with PCM Sound using QAM

NTSC Compatible Wide-Screen TV System with PCM Sound using QAM

A CATV (cable television) transmission experiment proved the complete compatibility of a wide-screen QAM (quadrature amplitude modulation) based TV system with CATV. Even under the worst CATV conditions (50 dB CTB, 38 dB C/N, slight annoying reflections), no specific impairment or degradation was perceived in the wide-screen TV or the NTSC. As a result of a subjective estimation of interference to conventional NTSC TV sets, it is shown that there is no need for a guard band between NTSC- and QAM-based TV channels. The system is capable of transmitting PCM (pulse-code-modulated) stereo sound. 320-kHz, 16 bit/sample data are efficiently band-compressed into about 250 kb/s using subband coding, and transmitted during some parts of the vertical blanking and vertical overscanning periods through the QAM channel. >

[1] Günther Theile,et al. Low-Bit Rate Coding of High Quality Audio Signals , 1987 .

[2] Yoshio Yasumoto,et al. A wide aspect ratio television system with full NTSC compatibility , 1988 .

[3] Yoshio Yasumoto,et al. An NTSC compatible wide screen television system with evolutionary extendibility , 1988 .

[4] Shuji Inoue,et al. A 6-MHz NTSC-Compatible Widescreen Television System with Pan-and-Scan Capability , 1990 .

[5] W.S. Ciciora. An introduction to cable television in the United States , 1990, IEEE LCS.

[6] Kiyoyuki Kawai,et al. A wide screen EDTV , 1989 .

[7] E. Kretzmer,et al. Generalization of a Techinque for Binary Data Communication , 1966 .

[8] James D. Johnston,et al. A filter family designed for use in quadrature mirror filter banks , 1980, ICASSP.

[9] Yoshio Yasumoto,et al. An Extended Definition Television System Using Quadrature Modulation of the Video Carrier with Inverse Nyquist Filter , 1987, IEEE Transactions on Consumer Electronics.