发明公开
- 专利标题： METHOD OF INSERTING ADDITIONAL DATA INTO A COMPRESSED SIGNAL
- 专利标题（中）： 方法夹杂附加数据成压缩信号
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申请号： EP02711036.0申请日： 2002-02-08
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公开(公告)号： EP1374414A2公开(公告)日： 2004-01-02
- 发明人: FERRIS, Gavin Robert , Woodward, Michael Vincent
- 申请人： Radioscape Limited
- 申请人地址： 2 Albany Terrace London NW1 4DS GB
- 专利权人： Radioscape Limited
- 当前专利权人： Radioscape Limited
- 当前专利权人地址： 2 Albany Terrace London NW1 4DS GB
- 代理机构： Langley, Peter James
- 优先权： GB0103245 20010209
- 国际公布： WO2002065651 20020822
- 主分类号： H03M7/30
- IPC分类号： H03M7/30
摘要：
Many compressed audio or video frames contain silence (if audio), or a blank image (if video); these essentially information content free (e.g. silent if audio or blank if video) frames can be both detected whilst still in compressed form and then used to carry the additional data. In an MPEG implementation, subbands associated with silent frames are rendered digitally silent and then used to carry PAD (Programme Associated Data).
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