Investigation of a digital sound system
Abstract
A digital sound system is defined which allows transmission of 16 high quality stereophonic sound programs within a 27 MHz WARC channel. Reception is possible in an area which is substantially larger than that valid for television (TV) reception. A 14 bit linear quantization and a sampling rate of 32 kHz are used. Transmission performance is improved by application of a BCH code with a mixed decoder strategy of error correction and, respectively, error detection with subsequent interpolation. In order to restrict out-of-band emissions to values in compliance with WARC requirements, 4 phases QPSK modulation with coherent detection is used. The signal then is sufficently narrowband to be distributed within the 14 MHz band of the special channels S2 and S3 in cable TV distribution (CATV) installations. Some CATV interference problems are pointed out which need experimental verification.
- Publication:
-
Final Report
- Pub Date:
- July 1982
- Bibcode:
- 1982aegt.rept.....G
- Keywords:
-
- Digital Television;
- Sound Transmission;
- Television Transmission;
- Bch Codes;
- Cable Television;
- Error Correcting Codes;
- Error Correcting Devices;
- Frequency Modulation;
- Satellite Transmission;
- Stereotelevision;
- Television Reception;
- Communications and Radar