An Experimental Differential PCM Encoder-Decoder for Viewphone Signals,
暂无分享,去创建一个
A fully digital differential pulse code modulation (d.p.c.m.) system has been constructed to provide a flexible and stable basis for subjective optimization of a technique for efficient coding of video telephone picture signals. The experimental encoder accepts a precoded 8-bit p.c.m. input and delivers a 4-bit d.p.c.m. output which may be corrupted by simulated channel errors before decoding and display. The implementation of the system is described and photographic results of the coding technique are presented.
[1] J. B. Millard,et al. The picturephone® system: Digital encoding of the video signal , 1971 .
[2] J. O. Limb,et al. Digital differential quantizer for television , 1969 .
[3] W. G. Scholes,et al. Television coding using two-dimensional spatial prediction , 1971 .
[4] Joel Max,et al. Quantizing for minimum distortion , 1960, IRE Trans. Inf. Theory.