PCM data transmitting apparatus and method
US4972417A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1989 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Jun 15, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/802
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data transmission and reception apparatus and method capable of selecting either of two modes having the same sampling frequency in which the bit number of one data unit are either m or n (which are integral numbers and m>n), while using the same error correction encoder and decoder for the two modes, by inserting m-n bits of dummy data bits into the n-bit data so as to handle it as m-bit data during the processes of error correction encoding and decoding and eliminating from the error correction encoded data the dummy data and a redundant code of the error correction code formed by the dummy data so that the data transmission rate can be lowered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.