基本信息:
- 专利标题: REPEATED DECODING AND ENCODING IN SUBBAND ENCODER/DECODERS
- 专利标题(中):在SUBBAND编码器/解码器中重复解码和编码
- 申请号:PCT/IB1996001118 申请日:1996-10-18
- 公开(公告)号:WO1997015984A1 公开(公告)日:1997-05-01
- 发明人: PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB , TEN KATE, Warner, Rudolph, Theophile
- 申请人: PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB
- 专利权人: PHILIPS ELECTRONICS N.V.,PHILIPS NORDEN AB
- 当前专利权人: PHILIPS ELECTRONICS N.V.,PHILIPS NORDEN AB
- 优先权: NL95202866.0 19951024
- 主分类号: H04B01/66
- IPC分类号: H04B01/66
摘要:
An encoding apparatus is provided for encoding a wideband digital signal, comprising an input (1) for receiving the wideband digital signal, a splitter unit (3) for splitting the wideband digital signal into a number of M sub-signals and a formatting unit (7) for assembling digital information including said data reduced sub-signals into a digital output signal having a format suitable for transmission or storage. During a repeated encoding and decoding of a wideband digital signal in a subband encoding/decoding system or a transform encoding/decoding system, signal degradation may occur. In order to avoid this, the apparatus further comprises a variable delay unit (20) coupled between the input (1) and the splitter unit (3), for realizing a delay, the length of which is controlled by a control signal, and a control signal generator unit (24) for generating said control signal.
摘要(中):
提供一种用于对宽带数字信号进行编码的编码装置,包括用于接收宽带数字信号的输入端(1),用于将宽带数字信号分解为多个M个子信号的分离器单元(3)和格式化单元 7)用于将包括所述数据简化的子信号的数字信息组装成具有适于传输或存储的格式的数字输出信号。 在子带编码/解码系统或变换编码/解码系统中对宽带数字信号的重复编码和解码期间,可能发生信号劣化。 为了避免这种情况,该装置还包括耦合在输入(1)和分离器单元(3)之间的可变延迟单元(20),用于实现其长度由控制信号控制的延迟,以及 控制信号发生器单元(24),用于产生所述控制信号。