Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth
US6700958B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 3, 2001 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Jul 3, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital audio transmitter system capable of transmitting high quality, wideband speech over a transmission channel with a limited bandwidth such as a traditional telephone line. The digital audio transmitter system includes a coder for coding an input audio signal to a digital signal having a transmission rate that does not exceed the maximum allowable transmission rate for traditional telephone lines and a decoder for decoding the digital signal to provide an output audio signal with an audio bandwidth of wideband speech. A coder and a decoder may be provided in a single device to allow two-way communication between multiple devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.