Patent ID: 11882316
Assignee: CABLE TELEVISION LABORATORIES, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A transmitter for a network, the transmitter in operable communication with a receiver over the network, the transmitter comprising:
an encoder configured to encode an input digitized sequence of data samples into a quantized sequence of data samples having a non-uniform distribution of amplitude levels with respect to a number of quantization digits, the quantized sequence having a first number of quantization digits per sample, according to a companding function C(x) applied to the input digitized sequence of data samples, where x is a normalized modulus of the input digitized sequence of data samples;
a mapping unit configured to map the quantized sequence of data samples into a mapped sequence of data samples having a second number of quantization digits per sample, the second number being lower than the first number; and
a modulator configured to modulate the mapped sequence of data samples and transmit the modulated mapped sequence over a digital link based on the second number of quantization digits,
wherein the receiver is enabled to (i) receive and demodulate the modulated mapped sequence from the digital link, (ii) map the demodulated sequence from the second number of quantization digits per sample into a remapped digital sequence having the first number of quantization digits per sample, (iii) decode the remapped digital sequence into a decoded digital sequence based on the companding function C(x) of the transmitter encoder, and (iv) output the decoded digital sequence.