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    • 1. 发明申请
    • IMAGE DECODING APPARATUS AND DECODING METHOD
    • 图像解码装置和解码方法
    • US20080238733A1
    • 2008-10-02
    • US12041395
    • 2008-03-03
    • Tatsuhiro SUZUMURAShuji MichinakaKiwamu WatanabeSatoshi TakekawaMasashi JobashiHiromitsu NakayamaYoshinori ShigetaTakaya OgawaAkihiro Oue
    • Tatsuhiro SUZUMURAShuji MichinakaKiwamu WatanabeSatoshi TakekawaMasashi JobashiHiromitsu NakayamaYoshinori ShigetaTakaya OgawaAkihiro Oue
    • H03M7/42
    • H03M7/40H03M7/42H04N19/13
    • According to the present invention, there is provided an image decoding apparatus having: a table selection controller configured to output a syntax selection signal which selects one of a prefix level_prefix, a suffix level_suffix, and a TrailingOnes syntax; a variable-length code decoding device configured to receive a bit stream, the syntax selection signal, and a suffix length suffixLength, and, by using data contained in the bit stream and the suffix length suffixLength, simultaneously decode the prefix level_prefix and the suffix level_suffix and output the result if the syntax selection signal selects the prefix level_prefix and the suffix level_suffix, and decode the TrailingOnes syntax and output the result if the syntax selection signal selects the TrailingOnes syntax; a level formation device configured to receive the decoded prefix level_prefix, the decoded suffix level_suffix, and the decoded TrailingOnes syntax, and form and output a level; and a suffix length updating device configured to receive the decoded prefix level_prefix, the decoded suffix level_suffix, and the decoded TrailingOnes syntax, and update the suffix length suffixLength.
    • 根据本发明,提供了一种图像解码装置,具有:表选择控制器,被配置为输出选择前缀level_prefix,后缀level_suffix和TrailingOnes语法之一的语法选择信号; 配置为接收比特流,语法选择信号和后缀长度suffixLength的可变长度码解码装置,并且通过使用包含在比特流和后缀长度suffixLength中的数据,同时解码前缀level_prefix和后缀level_suffix 并且如果语法选择信号选择前缀level_prefix和后缀level_suffix,并且如果语法选择信号选择TrailingOnes语法则解码TrailingOnes语法并输出结果,则输出结果; 电平形成装置,被配置为接收解码的前缀电平_prefix,解码的后缀电平补码和解码的TrailingOnes语法,并且形成并输出电平; 以及后缀长度更新装置,被配置为接收解码的前缀级别_refref,解码的后缀level_suffix和解码的TrailingOnes语法,并更新后缀长度suffixLength。
    • 6. 发明授权
    • Variable length code decoding apparatus and variable length code decoding method
    • 可变长码解码装置和可变长码解码方法
    • US07567189B2
    • 2009-07-28
    • US12027637
    • 2008-02-07
    • Takaya OgawaMasashi JobashiKiwamu WatanabeTatsuhiro SuzumuraSatoshi TakekawaHiromitsu NakayamaYoshinori ShigetaAkihiro OueShuji Michinaka
    • Takaya OgawaMasashi JobashiKiwamu WatanabeTatsuhiro SuzumuraSatoshi TakekawaHiromitsu NakayamaYoshinori ShigetaAkihiro OueShuji Michinaka
    • H03M7/40
    • H03M7/40
    • When a combination between a plurality of FIFO memories and a variable length coding table is used, a load generated by an increase in number of FIFO memories serving as output destinations of a codeword length output from the variable length coding table when the codeword length is output is reduced. A variable length code decoding apparatus includes an input unit which receives variable length coding data, a plurality of FIFO memories which store the variable length coding data and output or update the variable length coding data on the basis of a codeword length of the variable length coding data, a FIFO input selecting unit which outputs the variable length coding data to one of the plurality of FIFO memories, a variable length coding table storing unit which stores a variable length coding table representing a relationship between the variable length coding data, the codeword length and a decoding value, reads the variable length coding data stored in one of the plurality of FIFO memories, and compares the read variable length coding data with the variable length coding table, a table selecting unit which determines the codeword length and the decoding value on the basis of a comparison result of the variable length coding table storing unit, and outputs the determined codeword length to one of the plurality of FIFO memories, and a control unit which selects one of the plurality of FIFO memories as a destination FIFO memory, reads the variable length coding data from the input unit or one of the unselected FIFO memories, and controls the FIFO input selecting unit such that the read variable length coding data is output to the selected FIFO memory.
    • 当使用多个FIFO存储器和可变长度编码表之间的组合时,当输出码字长度时,由可变长度编码表输出的作为输出目的地的FIFO存储器的数量增加而产生的负载 降低了。 可变长度码解码装置包括接收可变长度编码数据的输入单元,存储可变长度编码数据的多个FIFO存储器,并且根据可变长度编码数据的码字长度输出或更新可变长度编码数据 数据,FIFO输入选择单元,其向多个FIFO存储器之一输出可变长度编码数据;可变长度编码表存储单元,其存储表示可变长度编码数据,码字长度之间的关系的可变长度编码表 和解码值,读取存储在多个FIFO存储器之一中的可变长度编码数据,并将读取的可变长度编码数据与可变长度编码表进行比较,确定代码字长度和解码值的表格选择单元 是可变长度编码表存储单元的比较结果的基础,并输出确定的码字 长度到多个FIFO存储器中的一个,以及选择多个FIFO存储器之一作为目的地FIFO存储器的控制单元,从输入单元或未选择的FIFO存储器之一读取可变长度编码数据,并且控制 FIFO输入选择单元,使得读取的可变长度编码数据被输出到所选择的FIFO存储器。
    • 7. 发明申请
    • VARIABLE LENGTH CODE DECODING APPARATUS AND VARIABLE LENGTH CODE DECODING METHOD
    • 可变长度代码解码器和可变长度代码解码方法
    • US20080198046A1
    • 2008-08-21
    • US12027637
    • 2008-02-07
    • Takaya OGAWAMasashi JobashiKiwamu WatanabeTatsuhiro SuzumuraSatoshi TakekawaHiromitsu NakayamaYoshinori ShigetaAkihiro OueShuji Michinaka
    • Takaya OGAWAMasashi JobashiKiwamu WatanabeTatsuhiro SuzumuraSatoshi TakekawaHiromitsu NakayamaYoshinori ShigetaAkihiro OueShuji Michinaka
    • H03M7/40
    • H03M7/40
    • When a combination between a plurality of FIFO memories and a variable length coding table is used, a load generated by an increase in number of FIFO memories serving as output destinations of a codeword length output from the variable length coding table when the codeword length is output is reduced.A variable length code decoding apparatus includes an input unit which receives variable length coding data, a plurality of FIFO memories which store the variable length coding data and output or update the variable length coding data on the basis of a codeword length of the variable length coding data, a FIFO input selecting unit which outputs the variable length coding data to one of the plurality of FIFO memories, a variable length coding table storing unit which stores a variable length coding table representing a relationship between the variable length coding data, the codeword length and a decoding value, reads the variable length coding data stored in one of the plurality of FIFO memories, and compares the read variable length coding data with the variable length coding table, a table selecting unit which determines the codeword length and the decoding value on the basis of a comparison result of the variable length coding table storing unit, and outputs the determined codeword length to one of the plurality of FIFO memories, and a control unit which selects one of the plurality of FIFO memories as a destination FIFO memory, reads the variable length coding data from the input unit or one of the unselected FIFO memories, and controls the FIFO input selecting unit such that the read variable length coding data is output to the selected FIFO memory.
    • 当使用多个FIFO存储器和可变长度编码表之间的组合时,当输出码字长度时,由可变长度编码表输出的作为输出目的地的FIFO存储器的数量增加而产生的负载 降低了。 可变长度码解码装置包括接收可变长度编码数据的输入单元,存储可变长度编码数据的多个FIFO存储器,并且根据可变长度编码数据的码字长度输出或更新可变长度编码数据 数据,FIFO输入选择单元,其向多个FIFO存储器之一输出可变长度编码数据;可变长度编码表存储单元,其存储表示可变长度编码数据,码字长度之间的关系的可变长度编码表 和解码值,读取存储在多个FIFO存储器之一中的可变长度编码数据,并将读取的可变长度编码数据与可变长度编码表进行比较,确定代码字长度和解码值的表格选择单元 是可变长度编码表存储单元的比较结果的基础,并输出确定的码字 长度到多个FIFO存储器中的一个,以及选择多个FIFO存储器之一作为目的地FIFO存储器的控制单元,从输入单元或未选择的FIFO存储器之一读取可变长度编码数据,并且控制 FIFO输入选择单元,使得读取的可变长度编码数据被输出到所选择的FIFO存储器。