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    • 3. 发明授权
    • Decoding method and apparatus using trace deletion for Viterbi algorithm
    • 使用维特比算法的跟踪删除的解码方法和装置
    • US5751734A
    • 1998-05-12
    • US742663
    • 1996-11-04
    • Hyung-Jin ChoiSung-Bae ChoSuk-Jin JungHyung-Kil Lee
    • Hyung-Jin ChoiSung-Bae ChoSuk-Jin JungHyung-Kil Lee
    • H03M13/41G06F11/10
    • H03M13/4161
    • A decoding apparatus for decoding input data using a Viterbi algorithm includes a first unit for repetitively performing determination of a survivor path corresponding to each state at each time unit based on the input data and a Trellis diagram, and for generating decision vectors and path number information whenever a branch path is determined. A second unit is provided for storing the decision vectors generated in the first unit and for outputting path information representing each survivor path determined by the stored decision vectors. A third unit stores the path number information output from the first unit and the path information output from the second unit, and deletes the branch path information corresponding to the path number information of the first unit from the stored path information, while retracing the previous states during the time when the branch path to be deleted does not overlap the other survivor path having a branch path connected to the next state. The third unit generates decoded data corresponding to input data based on the finally remaining survivor path.
    • 使用维特比算法解码输入数据的解码装置包括:第一单元,用于基于输入数据和网格图重复地执行与每个时间单位的每个状态对应的幸存路径的确定,并且用于生成决策向量和路径号信息 每当确定分支路径时。 第二单元被提供用于存储在第一单元中生成的判决向量,并且用于输出表示由存储的决策向量确定的每个幸存路径的路径信息。 第三单元存储从第一单元输出的路径号信息和从第二单元输出的路径信息,并且从所存储的路径信息中删除与所述第一单元的路径号信息对应的分支路径信息,同时还原先前状态 在要删除的分支路径不与具有连接到下一状态的分支路径的另一个幸存路径重叠的时间期间。 第三单元基于最终剩余的幸存路径生成与输入数据相对应的解码数据。
    • 4. 发明授权
    • Survivor memory device in viterbi decoder using trace deletion method
    • 在维特比解码器中使用痕迹删除方法的幸存者存储器件
    • US5796756A
    • 1998-08-18
    • US808663
    • 1997-02-28
    • Hyung-Jin ChoiSung-Bae ChoSuk-Jin JungHyung-Kil Lee
    • Hyung-Jin ChoiSung-Bae ChoSuk-Jin JungHyung-Kil Lee
    • H04N19/00H03M13/00H03M13/23H03M13/41H04N19/423H04N19/426H04N19/44H03M13/12
    • H03M13/6502H03M13/41H03M13/4169
    • A survivor memory device in a Viterbi decoder determines a final survivor path using a trellis diagram and decision vectors, and outputs decoded data corresponding to the determined survivor path. The survivor memory device includes a path existence information generator for receiving a plurality of decision vectors, and for generating first branch path existence information representing whether a branch path exists between each state and the corresponding next states in the trellis diagram. A plurality of units are serially connected with respect to the outputs of the path existence information generator. Each unit comprises a path existence information store for receiving and storing the first branch path existence information, a path removal signal generator for generating corresponding path removal signals when the first branch path existence information corresponding to each current state represents that corresponding branch paths do not exist between each current state and the corresponding next states, and a path existence information updator for receiving the first branch path existence information stored in the path existence information store and the path removal signals generated by the path removal signal generator, and for updating values of second branch path existence information corresponding to each current state to represent that corresponding branch paths do not exist between each current state and the corresponding previous states.
    • 维特比解码器中的幸存者存储器件使用网格图和判定向量来确定最终幸存者路径,并输出与所确定的幸存路径对应的解码数据。 幸存者存储装置包括路径存在信息发生器,用于接收多个判决向量,并且用于产生表示在每个状态和网格图中的对应的下一状态之间是否存在分支路径的第一分支路径存在信息。 多个单元相对于路径存在信息发生器的输出串联连接。 每个单元包括用于接收和存储第一分支路径存在信息的路径存在信息存储器,当与每个当前状态相对应的第一分支路径存在信息表示不存在对应的分支路径时,产生相应的路径去除信号的路径去除信号发生器 以及路径存在信息更新器,用于接收存储在路径存在信息存储器中的第一分支路径存在信息和由路径去除信号发生器产生的路径去除信号,并且用于更新第二个 分支路径存在信息对应于每个当前状态以表示在每个当前状态和相应的先前状态之间不存在对应的分支路径。