发明名称 |
Förfarande och anordning för att koda datasekvenser |
摘要 |
In a method and a device for transforming a stream of digital numbers, the correlation between successive numbers is utilized in order to obtain a new stream having a very low correlation between the numbers, whereby the sequence of numbers can be coded much more efficiently from a compression point of view. The numbers are for this purpose coded with the difference between a predicted number (s'(i)) and the actual number (s(i)) taking into account that the sequence does not need to be possible to decode in reverse order. The non-reversible codes can also be applied in lossy data compression schemes. Such schemes can change in accordance with the currently available bandwidth in order to obtain a graceful degradation and optimal bandwidth usage when the compressed data stream is transmitted over a channel having a time varying bandwidth. A general method and device for reversible coding are also provided. |
申请公布号 |
SE511186(C2) |
申请公布日期 |
1999.08.16 |
申请号 |
SE19970001351 |
申请日期 |
1997.04.11 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON |
发明人 |
FILIPPO *PASSAGGIO;TORBJOERN *EINARSSON;PER *THORELL |
分类号 |
H03M7/36;G06K9/36;G06K9/46;H03M;(IPC1-7):H03M7/36 |
主分类号 |
H03M7/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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