Technique for digital split-channel transmission using interpolative coders and decoders
First Claim
1. An encoder capable of transmitting binary encoded output signals representative of samples of an analog input message signal to the encoder, the encoder comprising:
- sampling means (10) responsive to an analog input message signal to the encoder for generating samples of the input message signal at a predetermined sampling rate; and
encoding means (14, 16,
18) responsive to the samples from said sampling means for encoding each of the received samples into a unique digital number pair signal representative of a quantized version of each received sample, each number pair signal including a first and a second digital number signal comprising M bits each for transmission over a first and a second channel or path, respectively, where predetermined ones of the possible unique digital number pair signals which can be formed by said encoding means comprise different first and second digital number signals and each of the associated first and second digital number signals provide a capability for substantially reconstructing the associated analog input message signal sample at a remote decoder.
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Abstract
The present invention relates to a technique using interpolative coders and decoders to permit an analog input message signal to be sampled at the Nyquist rate, each sample is then encoded into a corresponding level of an X-bit code and the encoded corresponding level is then encoded into a unique corresponding digital number pair. Each digital number pair includes two separate digital signals comprising Y bits each for transmission over two separate channels or paths to a remote receiver for inverse decoding. In accordance with the present technique either half of the transmitted signal can be used to reproduce the original signal to a fair degree of accuracy and both halves can provide high-quality reproduction of the original signal.
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Citations
11 Claims
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1. An encoder capable of transmitting binary encoded output signals representative of samples of an analog input message signal to the encoder, the encoder comprising:
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sampling means (10) responsive to an analog input message signal to the encoder for generating samples of the input message signal at a predetermined sampling rate; and encoding means (14, 16,
18) responsive to the samples from said sampling means for encoding each of the received samples into a unique digital number pair signal representative of a quantized version of each received sample, each number pair signal including a first and a second digital number signal comprising M bits each for transmission over a first and a second channel or path, respectively, where predetermined ones of the possible unique digital number pair signals which can be formed by said encoding means comprise different first and second digital number signals and each of the associated first and second digital number signals provide a capability for substantially reconstructing the associated analog input message signal sample at a remote decoder. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A decoder capable of decoding a digital split-channel signal comprising a first and a second number signal including M-bits each which forms a digital number pair signal, the first and second number signals being received over separate channels or paths and the number pair signal being a representation of a digitally encoded analog signal sample, the decoder comprising
a number decoder (321, 322) capable of determining each of the numbers received separately in the first and second number signals associated with each split-channel signal; - and
decoding means (36-38) capable of transforming each possible unique digital number pair signal into a unique analog signal sample, where predetermined ones of the possible digital number pair signals comprise first and second number signals of different values. - View Dependent Claims (8, 9, 10, 11)
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Specification