| 摘要 |
<p>Audio level control is provided for compressed audio. A processor (100) performs a process (102) that extracts scale factors for the compressed audio from an input MPEG audio data stream (104), alters the extracted scale factors without decompressing the compressed audio, and updates an output MPGG audio data stream (106) with the altered scale factors. All of the scale factors in the input MPEG audio data stream (104) arc altered and updated in the output MPEG audio data stream (106) based on a parameter identifying how the gain levels are to be altered.</p> |
