会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 41. 发明授权
    • Voice encoding method and voice decoding method
    • 语音编码方式和语音解码方式
    • US5473727A
    • 1995-12-05
    • US146580
    • 1993-11-01
    • Masayuki NishiguchiRyoji WakatsukiJun MatsumotoShinobu Ono
    • Masayuki NishiguchiRyoji WakatsukiJun MatsumotoShinobu Ono
    • G10L19/02G10L11/06G10L19/00H03M13/35G10L5/00
    • G10L19/005G10L19/10G10L25/93
    • A compressed digital speech signal is encoded to provide a transmission error-resistant transmission signal. The compressed speech signal is derived from a digital speech signal by performing a pitch search on a block obtained by dividing the speech signal in time to provide pitch information for the block. The block of the speech signal is orthogonally transformed to provide spectral data, which is divided by frequency into plural bands in response to the pitch information. A voiced/unvoiced sound discrimination generates voiced/-unvoiced (V/UV) information indicating whether the spectral data in each of the plural bands represents a voiced or an unvoiced sound. The spectral data in the plural bands are interpolated to provide spectral amplitudes for a predetermined number of bands, independent of the pitch. Hierarchical vector quantizing is applied to the spectral amplitudes to generate upper-layer indices, representing an overview of the spectral amplitudes, and lower-layer indices, representing details of the spectral amplitudes. CRC error detection coding is applied to the upper-layer indices, the pitch information, and the V/UV information to generate CRC codes. Convolution coding for error correction is applied to the upper-layer indices, the higher-order bits of the lower-layer indices, the pitch information, the V/UV information, and the CRC codes. The convolution-coded quantities from two blocks of the speech signal are then interleaved in a frame of the transmission signal, together with the lower-order bits of the respective lower-layer indices.
    • 对压缩的数字语音信号进行编码,以提供传输错误传输信号。 通过对通过对语音信号进行时间分割获得的块来执行音调搜索,从数字语音信号导出压缩语音信号,以提供块的音调信息。 语音信号的块被正交变换以提供频谱数据,频谱数据响应于音调信息被频率划分成多个频带。 有声/无声的声音识别产生指示多个频带中的每一个中的频谱数据是否表示有声或无声的声音/未发音(V / UV)信息。 对多个频带中的频谱数据进行插值,以提供与频率无关的预定数量频带的频谱幅度。 层次矢量量化被应用于频谱幅度以产生表示频谱幅度的概览的上层索引,以及表示频谱幅度细节的下层索引。 将CRC错误检测编码应用于上层索引,音调信息和V / UV信息以产生CRC码。 用于纠错的卷积编码被应用于上层索引,下层索引的高阶比特,音调信息,V / UV信息和CRC码。 然后,将来自语音信号的两个块的卷积编码量与发送信号的帧一起与各个下层索引的低位比特进行交织。
    • 45. 发明授权
    • Method of controlling channel assignment in a time division multiplexing
network
    • 控制时分复用网络中信道分配的方法
    • US4187401A
    • 1980-02-05
    • US909669
    • 1978-05-25
    • Jun Matsumoto
    • Jun Matsumoto
    • H04Q3/52H04Q11/04H04J3/00
    • H04Q11/04
    • In a time division multiplex network the channel assignment is controlled by assigning each channel, in a channel-by-channel sequence, to each subscriber pair that are communicating or wish to communicate. The subscriber address-data of the addressee or the addressor of each so-assigned channel is stored in a circulating read/write memory with a reset word stored in a memory location following the last memory location containing subscriber address-data. The memory locations are addressed in a successive manner in response to an incrementing clock count and the subscriber address-data, as they are read out from the successively addressed memory locations, are used to provide gating pulses to the respective subscriber modulator/demodulators, and the reset word, when it is read out, resets the memory to repeat the memory read-out cycle. The number of occupied memory locations varies in accordance with the traffic demands to provide a high efficiency service per unit time and high modulation/demodulation qualities during periods of low traffic.
    • 在时分复用网络中,通过将每个信道逐个通道序列分配给正在通信或希望通信的每个用户对来控制信道分配。 每个所分配的频道的收件人或地址的用户地址数据被存储在具有存储在包含用户地址数据的最后存储器位置之后的存储器位置中的复位字的循环读/写存储器中。 响应于递增的时钟计数,存储器位置以连续的方式被寻址,并且当用户地址数据从连续寻址的存储器位置读出时,它们用于向相应的用户调制器/解调器提供门控脉冲,以及 复位字在读出时复位存储器以重复存储器读出周期。 占用存储器位置的数量根据业务需求而变化,以在低业务量期间提供每单位时间的高效率服务和高调制/解调质量。