Quantization codeword selection for low cost parity checking

A method for signal processing at a receiving device, comprising:

• receiving a data packet comprising a plurality of intervals each having the same bit length and comprising one or more entropy symbols corresponding to one or more quantization bands;
• identifying a first portion and a second portion of a first entropy symbol of the one or more entropy symbols, the first portion of the first entropy symbol in a first interval of the plurality of intervals and the second portion of the first entropy symbol in a second interval of the plurality of intervals;
• identifying one bit for each interval of the data packet as a parity bit based at least in part on an indication of the identified parity bit included in the data packet;
• initiating a decoding procedure for the packet, wherein the length of each entropy symbol changes responsive to one or more encoding or decoding errors;
• determining, based at least in part on identifying the parity bit and identifying the first portion and the second portion of the first entropy symbol, that an error has occurred in encoding or decoding in the first interval and the second interval;
• applying an error mask to the first interval, the second interval, or both;
• and
• successfully completing the decoding procedure for the data packet based at least in part on applying the error mask.

An apparatus for signal processing at a transmitting device, comprising:

• a processor,
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• generate one or more entropy symbols for each quantization band of a plurality of quantization bands, each entropy symbol comprising one or more bits of encoded data corresponding to a portion of an input signal in a respective quantization band, wherein the length of at least one of the one or more entropy symbols changes responsive to one or more encoding or decoding errors;
• stack the one or more entropy symbols into a plurality of intervals of a data packet, each interval having the same bit length;
• select one bit of the one or more entropy symbols for each interval of the plurality of intervals as a parity bit for each respective interval;
• identify a first portion and a second portion of a first entropy symbol of the one or more entropy symbols that is in a first interval of the plurality of intervals, wherein the first portion is within a bit length of the first interval and the second portion is outside the bit length of the first interval;
• identify a second interval of the plurality of intervals, the one or more entropy symbols stacked in the second interval being shorter than a bit length of the second interval;
• allocate the second portion of the first entropy symbol to the second interval based at least in part on identifying the first portion and the second portion and identifying the second interval;
• and
• transmit the data packet to a receiving device based at least in part on the allocating, wherein the data packet includes an indication of the selected parity bit.