Transcoding of audio data
US6308222A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Nov 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/478
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A proxy server has a connection to a client computer and to a remote server over the Internet. The proxy server receives a request for an audio file from the client computer and, in response, transmits a requests for the audio file to the remote server. Upon receiving the audio file, the proxy server determines whether transcoding of the audio file is appropriate. If appropriate, the proxy server transcodes the audio file received from the remote server and then transmits the transcoded audio file to the client. Transcoding may include changing the audio file type, compressing the audio file, reducing the number of audio channels, or reducing the sampling rate of the data. The proxy server determines the extent and type of transcoding to be performed on the audio file as the audio file is downloaded from the remote server. The extent and type of transcoding are based on the file formats which the client is capable of handling, the size of the requested audio file, the memory capacity of the client, the bandwidth of the connection between the local server and the client, and the desired level of audio quality. Transcoding may be performed on-the-fly while the requested audio file is…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.