Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Yuji Kaihotsu

Akihiro Yamamoto

Takashi Kuwabara

Toshiaki Mori

Manabu Nakakita

Takehiko Yasuda

Katsushi Yamada

Toshikazu Chiba

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.

Content transmission device and content reproduction device

A data accumulating apparatus, comprising: storage media; receiving means for receiving digital raw data about specific information from an external electronic device; first accumulating means for accumulating the digital raw data received by the receiving means into the storage media; producing means for producing first data equal to the digital raw data accumulated in the storage media; compressing means for compressing the first data produced by the producing means to produce coded data in association with the digital raw data accumulated in the storage media; and second accumulating means for accumulating the digital coded data produced by the compressing means into the storage media.

Data accumulating method and apparatus

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.

Sound reproduction apparatus

Growing community of inventors

Yokohama, Japan

Yuji Kaihotsu