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    • 52. 发明授权
    • Communication terminal and communication method
    • 通信终端和通信方式
    • US08694326B2
    • 2014-04-08
    • US13590243
    • 2012-08-21
    • Shuji MiyasakaKosuke NishioIchiro Kawashima
    • Shuji MiyasakaKosuke NishioIchiro Kawashima
    • G10L21/00H04B1/38H04M1/00H04M3/42H04M9/08G06F3/00G06F15/16G06F11/00
    • H04M9/082H04B3/23
    • A communication terminal includes a decoder which decodes an input bitstream received from another communication terminal, to generate an output audio signal and outputs the generated output audio signal to a speaker; and an echo canceller which obtains an input audio signal representing sound captured by a microphone placed in a space to which the speaker outputs the sound, and removes, for respective subbands, an echo component included in the obtained input audio signal and corresponding to the output audio signal, to generate an audio signal for transmission. An encoder codes the audio signal for transmission to generate an output bitstream and transmits the generated output bitstream to another communication terminal; and a control unit controls, for the respective subbands, echo cancellation processing according to a reproduction band of at least one of the output audio signal and the audio signal for transmission.
    • 通信终端包括解码器,其对从另一通信终端接收的输入比特流进行解码,以产生输出音频信号,并将所生成的输出音频信号输出到扬声器; 以及回波消除器,其获得表示放置在扬声器输出声音的空间中的麦克风捕获的声音的输入音频信号,并且针对各个子带去除包含在所获得的输入音频信号中并对应于输出的回波分量 音频信号,以产生用于传输的音频信号。 编码器对音频信号进行编码以进行传输以产生输出比特流,并将生成的输出比特流发送到另一通信终端; 并且控制单元根据输出音频信号和音频信号中的至少一个的再现频带对各个子带进行回波消除处理,以进行传输。
    • 54. 发明授权
    • Audio encoder
    • 音频编码器
    • US07848931B2
    • 2010-12-07
    • US11659949
    • 2005-08-18
    • Shuji MiyasakaYoshiaki TakagiNaoya TanakaMineo Tsushima
    • Shuji MiyasakaYoshiaki TakagiNaoya TanakaMineo Tsushima
    • G10L19/00
    • G11B27/022G10L19/008G11B20/00007
    • An audio encoder, which is capable of encoding multiple-channel signals so that only a downmixed signal is decoded and of further generating specific auxiliary information necessary for dividing the downmixed signal, is provided.An audio encoder (10), which compresses and encodes audio signals of N-channels (N>1), includes a downmixed signal encoding unit (11) which encodes the downmixed signal obtained by downmixing the audio signals, and an auxiliary information generation unit (12a) which generates auxiliary information necessary for decoding the downmixed signal encoded by the downmixed signal encoding unit (11) into N-channel audio signals. The auxiliary information generation unit (12a) includes transformation units (121) and (122) which transform audio signals respectively into frequency domain signals, a detection unit (123) which detects phase difference information and gain ratio information each indicates a degree of difference between frequency domain signals, and a quantization unit (125) which quantizes, for each frequency band, the phase difference information and gain ratio information detected by the detection unit (123) using the quantization precision setting table (124). The quantization precision setting table (124) functions as a division unit which divides a frequency band of a frequency domain signal into plural sub-bands.
    • 一种音频编码器,其能够对多声道信号进行编码,使得只下降混合信号被解码,并且进一步产生分割下混合信号所需的特定辅助信息。 对N声道(N> 1)的音频信号进行压缩编码的音频编码器(10)包括下混合信号编码单元(11),其对通过降低音频信号而获得的下混合信号进行编码,以及辅助信息生成单元 (12a),其生成将由下混合信号编码单元(11)编码的下混合信号解码为N声道音频信号所需的辅助信息。 辅助信息生成单元(12a)包括将音频信号分别变换为频域信号的变换单元(121)和(122),检测单元(123),检测相位差信息和增益比信息,每个都表示 频域信号,以及量化单元(125),其对于每个频带,使用量化精度设定表(124)对由检测单元(123)检测的相位差信息和增益比信息进行量化。 量化精度设定表(124)作为将频域信号的频带划分为多个子带的分割单位起作用。
    • 55. 发明申请
    • SIGNAL PROCESSING APPARATUS
    • 信号处理装置
    • US20090207775A1
    • 2009-08-20
    • US12438996
    • 2007-11-29
    • Shuji MiyasakaMichihiro Matsumoto
    • Shuji MiyasakaMichihiro Matsumoto
    • H04H20/71H04L12/56G10L19/00
    • G10L19/167G10L21/038G11B2020/00028H04Q11/0428
    • When a coded signal having a layer structure is generated, insertion of header information in a sub-layer in each frame increases the bit rate. In contrast, when the header information is only inserted at regular intervals, a reproducer sometimes cannot obtain information necessary in a reproduction start point.The signal processing apparatus inserts the header information in a frame to probably be the reproduction start point by including: the first (100) and the second (101) coding units that code an input signal per frame; the first header inserting unit (103) that inserts the SBR header indicating management information of the coded signal represented by a sequence of frames, in each frame at a regular interval within the coded signal; the control unit (105) that determines a frame in which the SBR header is inserted, independent of the frames in which the first header inserting unit inserts the SBR header; and the second header inserting unit (104) that singly inserts the SBR header in the frame determined by the control unit.
    • 当产生具有层结构的编码信号时,标题信息在每个帧中的子层中的插入增加了位速率。 相反,当标题信息仅以规则的间隔插入时,再现器有时不能获得再现开始点所需的信息。 信号处理装置通过包括:对每帧输入信号进行编码的第一(100)和第二(101)个编码单元,将标题信息插入到可能是再现开始点的帧中; 第一标题插入单元,以编码信号内的规则间隔插入指示由帧序列表示的编码信号的管理信息的SBR标题; 控制单元(105),其独立于第一报头插入单元插入SBR报头的帧,确定其中插入SBR报头的帧; 以及在由控制单元确定的帧中单独地插入SBR头部的第二头插入单元(104)。
    • 57. 发明授权
    • Compiler, compiler apparatus and compilation method
    • 编译器,编译器和编译方法
    • US07284241B2
    • 2007-10-16
    • US10630705
    • 2003-07-31
    • Taketo HeishiToshiyuki SakataHajime OgawaRyoko MiyachiShuji MiyasakaTomokazu Ishikawa
    • Taketo HeishiToshiyuki SakataHajime OgawaRyoko MiyachiShuji MiyasakaTomokazu Ishikawa
    • G06F9/45
    • G06F8/443G06F8/425G06F8/427G06F8/4441
    • An operator definition file 102 and the like included in a source program 101 and a compiler 100 that translates the source program 101 into a machine language program 105 are provided. The operator definition file 102 includes definitions of various fixed point type operators by class definitions. The compiler 100 can generate effectively advanced and specific instructions that a processor executes and make improvements through expanding functions and the like without repeating frequently upgrading of the version of the compiler itself. The compiler 100 is made up of an intermediate code generation unit 121 that generates intermediate codes, a machine language instruction substitution unit 122 that substitutes the intermediate codes referring to classes defined by the operator definition file 102 with machine language instructions and an optimization unit 130 that performs optimization targeting the intermediate codes including the substituted machine language instructions.
    • 提供包括在源程序101中的操作者定义文件102等以及将源程序101转换为机器语言程序105的编译器100。 操作者定义文件102包括通过类定义的各种定点类型操作符的定义。 编译器100可以生成有效的高级特定指令,处理器执行并通过扩展功能等进行改进,而不会重复频繁升级编译器本身的版本。 编译器100由生成中间代码的中间代码生成单元121构成,机器语言指令替换单元122,其使用机器语言指令代替参考由操作者定义文件102定义的类别的中间代码和优化单元130, 执行针对包括替代机器语言指令的中间代码的优化。
    • 59. 发明申请
    • Signal processing apparatus
    • 信号处理装置
    • US20050182902A1
    • 2005-08-18
    • US11052979
    • 2005-02-09
    • Shuji Miyasaka
    • Shuji Miyasaka
    • G06F12/08G06F12/12H03M7/42
    • G06F12/121G06F12/126H03M7/425
    • A signal processing apparatus (1) performs decoding using a first memory area (11) of a main memory (10), a first table (13) of a second memory area (12) and a second table (14). The signal processing apparatus (1) has a cache memory (34) for temporarily storing data of the first table (13) and the second table (14), a processor (20) which reads out the data by accessing at least one of the first memory area (11) and the second memory area (12) via the cache memory (34), and a control unit (51) which allocates a space in the cache memory (34) when there is no space for temporarily storing in the cache memory (34). The control unit (51) allocates the space in the cache memory (34) into which the data in the first memory area (11) is stored preferentially to the data in the second memory area (12).
    • 信号处理装置(1)使用主存储器(10)的第一存储区域(11),第二存储区域(12)和第二表格(14)的第一表格(13)进行解码。 信号处理装置(1)具有用于临时存储第一表(13)和第二表(14)的数据的高速缓存存储器(34),处理器(20),其通过访问至少一个 第一存储区域(11)和第二存储器区域(12),以及控制单元(51),当没有用于临时存储的空间时,在高速缓冲存储器(34)中分配空间 缓存存储器(34)。 控制单元(51)将优先存储第一存储区域(11)中的数据的高速缓冲存储器(34)中的空间分配给第二存储区域(12)中的数据。