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    • 5. 发明专利
    • Viterbi decoding device
    • VITERBI解码器
    • JP2007013337A
    • 2007-01-18
    • JP2005188846
    • 2005-06-28
    • Sony Corpソニー株式会社
    • MIYAUCHI TOSHIYUKIMIZUTANI YUICHI
    • H03M13/41G06F11/10
    • H03M13/4176H03M13/4169H03M13/6502
    • PROBLEM TO BE SOLVED: To enable a viterbi decoding device to reduce power consumption in tracing.
      SOLUTION: A path memory part 15 of a viterbi decoding device for decoding a superimposition code is divided into an upper RAM for storing a selection path in a transition status where the least significant bit is 0 and a lower RAM for storing a selection path in a transition status where the least significant bit is 1. The data reading pause control of the upper RAM and the lower RAM is independently performed by a control circuit 26. The control circuit 26 specifies the RAM where it is not necessary to read the selection path by referring to the least significant bit of the transition status at the start of tracing in the tracing, and controls reading pause to the specified RAM.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:使维特比解码设备能够降低跟踪中的功耗。 解决方案:用于解码叠加码的维特比解码装置的路径存储器部分15被划分为用于存储最低有效位为0的转换状态中的选择路径的上部RAM和用于存储选择的下部RAM 最低有效位为1的转换状态的路径。上位RAM和下位RAM的数据读取暂停控制由控制电路26独立执行。控制电路26指定不需要读取RAM的RAM 通过参考跟踪开始时的转移状态的最低有效位,并将读取暂停控制到指定的RAM,来选择路径。 版权所有(C)2007,JPO&INPIT
    • 7. 发明专利
    • Decoding apparatus and decoding method
    • 解码设备和解码方法
    • JP2010206570A
    • 2010-09-16
    • JP2009050200
    • 2009-03-04
    • Sony Corpソニー株式会社
    • SHINAGAWA HITOSHINODA MAKOTOYAMAGISHI HIROYUKI
    • H03M13/41
    • H03M13/4176H03M13/4169H03M13/6561
    • PROBLEM TO BE SOLVED: To enable suppression of the size of memory which stores path selection information used in trace-back processes, and the latency accompanying decoding. SOLUTION: After xN-bit path selection information for radix -2 x is input with respect to a shift register 81 per clock and the amount corresponding to input k is stored, the amount of path selection information (kxN bits) is written at an address of a path memory RAM 82. In a trace-back circuit 83, the maximum likelihood path is selected, when a trace-back process takes place, based on the path selection information stored in the path memory RAM 82, and the value corresponding to each state on the maximum likelihood path is output as a decoding sequence. The present invention is applicable to receiving devices. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:为了能够抑制存储跟踪过程中使用的路径选择信息的存储器的大小以及伴随解码的等待时间。

      解决方案:在每个时钟相对于移位寄存器81输入基数-2 x 的xN位路径选择信息之后,存储对应于输入k的量,路径选择量 在路径存储器RAM82的地址处写入信息(kxN位)。在追溯回路83中,基于存储在路径存储器RAM 82中的路径选择信息,当追溯处理发生时,选择最大似然路径 路径存储器RAM82,并且输出与最大似然路径上的每个状态相对应的值作为解码序列。 本发明可应用于接收设备。 版权所有(C)2010,JPO&INPIT