Patent
Method and apparatus for digitally processing a high definition television augmentation signal
Faramarz Azadegan,Eberhard Fisch +1 more
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TLDR
In this article, a method and apparatus for digital encoding are described for compressing the augmentation channel signals (chrominance and luminance signals for panel information and high frequency luminance and line difference signal) so that this information can be transmitted in a 3 MHz wide RF channel using a digital transmission scheme.Abstract:
A method and apparatus for digital encoding are described for compressing the augmentation channel signals (chrominance and luminance signals for panel information and high frequency luminance and line difference signal) so that this information can be transmitted in a 3 MHz wide RF channel using a digital transmission scheme such as QPSK. Analog signal components are sampled and converted to digital signals. Each of the signals is fed into a separate coder which reduces the number of bits/pixel required to reconstruct the original signal. Compression is achieved by quantization and removal of redundancy. The compression scheme is based on the use of DCT together with VLC. Each augmentation signal has its own coder, which is adapted to the unique statistics of this signal.read more
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Patent
Narrow bandwidth signal transmission
Joseph A. Osborne,Cindy Seiffert +1 more
TL;DR: In this article, the authors proposed a method and apparatus for compressing digital data for transmission and reception in a narrow bandwidth, the method comprising preliminarily smoothing raw data according to a spatial convolution or running average technique, sampling the convoluted or averaged data to produce a subset having information from the full set of raw data, but fewer data points, determining the energy of the subset with a transform coder, encoding the transformed image, predicting the full data points at and between the points in the subset by means of a prediction algorithm, subtracting the raw data from the thus
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Digital video signal encoding arrangement, and corresponding decoding arrangement
TL;DR: In this paper, a digital video signal encoding arrangement comprising a correlation reducing circuit receiving said digital signals which are representative of the luminance or the chrominance of a certain number of elements of a picture which has been divided into blocks, a scanning conversion circuit (30), a normalization circuit (50), a quantizing circuit (60), a circuit (70) for encoding said quantized values and a rate controlling circuit (80).