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    • 11. 发明授权
    • Subband encoding and decoding system for data compression and decompression
    • 用于数据压缩和解压缩的子带编解码系统
    • US06693963B1
    • 2004-02-17
    • US09625512
    • 2000-07-25
    • Shohei Taniguchi
    • Shohei Taniguchi
    • H04N712
    • G10L19/0208H04B1/667H04N19/115H04N19/146H04N19/61H04N19/63
    • A subband encoding and a decoding system are provided. The subband encoding system measures signal levels of subband signals to determine scale factors to obtain scale factor information and produces bit allocation information based on the scale factor information, scale factor flag information indicating the fact that the scale factor information has changed from that one frame earlier, and updated scale factor information indicating the scale factor information which has changed from that one frame earlier. The subband encoding system re-quantizes the subband signals using the scale factor information and the bit allocation information to provide re-quantized output signals and constructs as an encoded output signal a frame made up of the re-quantized signals, the updated scale factor information, and the scale factor flag information. The number of subbands of the subband signals to be re-quantized is determined by an upper limit frequency of an audible band. This results in a decrease in operation load of the subband encoding and decoding systems.
    • 提供了子带编码和解码系统。 子带编码系统测量子带信号的信号电平以确定比例因子以获得比例因子信息,并且基于比例因子信息产生比特分配信息,比例因子标志信息指示比例因子信息已经从先前的一帧改变 以及更新的比例因子信息,其指示从之前的一帧改变的比例因子信息。 子带编码系统使用比例因子信息和比特分配信息对子带信号进行重新量化,以提供重新量化的输出信号,并且将由重新量化的信号构成的帧构造为编码的输出信号,更新的比例因子信息 ,以及比例因子标志信息。 要重新量化的子带信号的子带的数量由可听频带的上限频率确定。 这导致子带编码和解码系统的操作负载的降低。
    • 15. 发明授权
    • Bidirectional digital wireless system transmitting and receiving asymmetric frames
    • 双向数字无线系统发送和接收非对称帧
    • US07317713B2
    • 2008-01-08
    • US10353704
    • 2003-01-29
    • Shohei Taniguchi
    • Shohei Taniguchi
    • H04J3/00H04J3/24H04L12/28
    • H04B7/2656
    • Herein disclosed is a bidirectional digital wireless system transmitting and receiving asymmetric transmission frames comprising: a mobile station for transmitting a plurality of uplink transmission frames each including a guard frame portion and a data frame portion carrying a main information segment; and a base station for receiving the uplink transmission frames, and generating and transmitting a plurality of downlink transmission frames each including an information frame element carrying a subsidiary information segment to the mobile station, whereby the base station is operative to divide the information frame element into a predetermined number of information frame portions respectively corresponding to the guard frame portions of the uplink transmission frame with respect to time length, and generate and transmit a plurality of downlink transmission frames each including the information frame portions collectively forming an information frame element carrying a subsidiary information segment to the mobile station.
    • 这里公开了发送和接收非对称传输帧的双向数字无线系统,包括:移动台,用于发送多个上行链路传输帧,每个上行链路传输帧包括保护帧部分和承载主信息段的数据帧部分; 以及用于接收上行链路传输帧的基站,并且生成并发送多个下行链路传输帧,每个下行链路传输帧包括携带辅助信息段的信息帧元素到移动站,由此基站可操作以将信息帧元素分成 相对于时间长度分别对应于上行链路传输帧的保护帧部分的预定数量的信息帧部分,并且生成并发送多个下行链路传输帧,每个下行链路传输帧包括共同形成携带辅助的信息帧元素的信息帧部分 信息段到移动台。