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    • 1. 发明申请
    • Content transmission device and content reproduction device
    • 内容传输设备和内容再现设备
    • US20070032975A1
    • 2007-02-08
    • US10576586
    • 2005-02-14
    • Toshiaki MoriYuji KaihotsuAkihiro TamamotoTakashi KuwabaraManabu Nakakita
    • Toshiaki MoriYuji KaihotsuAkihiro TamamotoTakashi KuwabaraManabu Nakakita
    • G01D18/00G01R35/00G01P21/00
    • H04W28/22H04L67/04H04W28/06H04W28/14H04W84/12
    • The present invention realizes streaming reproduction in an environment in which a communication speed changes due to a change in the position of a moving body such as a vehicle. A content reproduction device 10 includes: a plurality of communication units (a cellular phone 101 and a wireless LAN communication unit 104), each receiving a content transmitted in segments from a content transmission device over a communication path; a content reconstruction unit 113 that has a buffer 1130 in which each segmented data of the content received by each of the communication units is temporarily accumulated, and that reconstructs each segmented data accumulated in the buffer 1130 into the content; a reproduction unit 114 that reproduces, at a predetermined bit rate, the content reconstructed by the content reconstruction unit 113; and a communication control unit 110 that: calculates, for every predetermined time, target transmission speeds to be assigned for content reception performed by the respective communication units, based on free space in the buffer 1130 and the bit rate; and transmits a first request signal indicating the calculated target transmission speeds to the content transmission device via one of the communication units.
    • 本发明在车辆等移动体的位置变化引起通信速度变化的环境中实现流再现。 内容再现装置10包括:多个通信单元(蜂窝电话101和无线LAN通信单元104),每个通信通信单元通过通信路径接收来自内容发送设备的以段发送的内容; 具有缓冲器1130的内容重构单元113,其中由每个通信单元接收的内容的每个分段数据被暂时累积,并且将在缓冲器1130中累积的每个分段数据重新构成内容; 以预定比特率再现由内容重构单元113重构的内容的再现单元114; 以及通信控制单元110,其针对每个预定时间,基于各个通信单元基于缓冲器1130中的可用空间和比特率来计算要分配用于内容接收的目标传输速度; 并且经由所述通信单元之一向内容发送设备发送指示计算出的目标传输速度的第一请求信号。
    • 2. 发明授权
    • Content transmission device and content reproduction device
    • 内容传输设备和内容再现设备
    • US08352989B2
    • 2013-01-08
    • US10576586
    • 2005-02-14
    • Toshiaki MoriYuji KaihotsuAkihiro YamamotoTakashi KuwabaraManabu Nakakita
    • Toshiaki MoriYuji KaihotsuAkihiro YamamotoTakashi KuwabaraManabu Nakakita
    • H04N7/18H04N7/16H04N7/173H04W4/00
    • H04W28/22H04L67/04H04W28/06H04W28/14H04W84/12
    • A content reproduction device includes: a plurality of communication units (a cellular phone and a wireless LAN communication unit), each receiving a content transmitted in segments from a content transmission device over a communication path; a content reconstruction unit that has a buffer in which each segmented data of the content received by each of the communication units is temporarily accumulated, and that reconstructs each segmented data accumulated in the buffer into the content; a reproduction unit that reproduces, at a predetermined bit rate, the content reconstructed by the content reconstruction unit; and a communication control unit that: calculates, for every predetermined time, target transmission speeds to be assigned for content reception performed by the respective communication units, based on free space in the buffer and the bit rate; and transmits a first request signal indicating the calculated target transmission speeds to the content transmission device via one of the communication units.
    • 内容再现装置包括:多个通信单元(蜂窝电话和无线LAN通信单元),每个通信通信单元通过通信路径从内容传输设备接收在段中发送的内容; 内容重建单元,其具有缓冲器,其中由每个通信单元接收到的内容的每个分段数据被暂时累积,并且将在缓冲器中累积的每个分段数据重建为内容; 以预定比特率再现由内容重构单元重构的内容的再现单元; 以及通信控制单元,其基于所述缓冲器中的可用空间和所述位速率,针对每个预定时间计算要分配给由所述各个通信单元执行的内容接收的目标传输速度; 并且经由所述通信单元之一向内容发送设备发送指示计算出的目标传输速度的第一请求信号。
    • 4. 发明授权
    • Sound reproduction apparatus
    • 声音再现装置
    • US5796847A
    • 1998-08-18
    • US522925
    • 1995-09-01
    • Yuji KaihotsuToshikazu ChibaKatsushi Yamada
    • Yuji KaihotsuToshikazu ChibaKatsushi Yamada
    • H03G3/32H03G3/20
    • H03G3/32
    • A sound reproduction apparatus for a vehicle comprises: a sound source for generating a sound signal; a sound reproduction portion for reproducing a sound from the sound signal into a compartment of the vehicle; a microphone, provided in the compartment, for detecting the sound transmitted in the compartment and environmental sound noise and for generating a sound detection signal; a detection portion for detecting a magnitude of the environmental sound noise by detecting a difference between magnitudes of the sound signal and the sound detection signal; and a volume control portion for effecting volume controlling of the sound signal according to the magnitude of the environmental sound noise from the detection portion. An equalizing portion substantially equalizing gains of signal paths of the sound signal and sound detection signal supplied to the detection portion in a substantially silent condition of the compartment is provided. For accurate equalizing of gains, a reference sound signal source is provided. A part of frequency range of the sound signal is enhanced according to the sound noise. The volume controlling with the environmental sound noise is modified according to a peak level, an external volume control signal. The noise level may be classified. A large change in the volume within a short interval is avoided.
    • 用于车辆的声音再现装置包括:用于产生声音信号的声源; 声音再现部分,用于将声音信号再现到车辆的隔间; 设置在隔室中的麦克风,用于检测在隔间中传播的声音和环境声音噪声,并产生声音检测信号; 检测部,其通过检测声音信号的大小与声音检测信号的差异来检测环境声音噪声的大小; 以及音量控制部分,用于根据来自检测部分的环境声音噪声的大小进行声音信号的音量控制。 提供均衡部分,其基本上均衡在隔室的基本无声状态下提供给检测部分的声音信号和声音检测信号的信号路径的增益。 为了准确地均衡增益,提供了参考声音信号源。 声音信号的频率范围的一部分根据声音噪声而增强。 根据峰值电平,外部音量控制信号修改环境声音噪音的音量。 噪声水平可以分类。 避免了短时间内的体积变化很大。