Title:
MEDIUM SIGNAL RECEPTION DEVICE, TRANSMISSION DEVICE, AND TRANSMISSION/RECEPTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2004/112420
Kind Code:
A1
Abstract:
A transmission/reception system for transmitting a medium signal such as moving picture data and audio data includes a transmission device for transmitting a medium signal to a transmission path and a reception device for receiving a medium signal via the transmission path. The reception device has a buffer for temporarily storing the medium signal from the transmission device, a monitoring section for monitoring the accumulation amount in the buffer, and a control section for outputting a control signal to the transmission path when the accumulation amount exceeds a predetermined value or becomes lower than a threshold value. The transmission device has an accumulation section for storing medium signals of at least two different bit rates and an output section for receiving a control signal outputted from the reception device to the transmission path and switching the bit rate according to the control signal when outputting the medium signal from the accumulation section.
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Inventors:
OZAWA KAZUNORI (JP)
Application Number:
PCT/JP2004/008034
Publication Date:
December 23, 2004
Filing Date:
June 09, 2004
Export Citation:
Assignee:
NEC CORP (JP)
OZAWA KAZUNORI (JP)
OZAWA KAZUNORI (JP)
International Classes:
G06F13/00; H04L45/80; H04L47/30; H04N7/173; H04N21/442; H04N21/6377; H04W4/06; H04W28/14; H04W36/02; H04W36/08; (IPC1-7): H04Q7/38; H04L12/56
Domestic Patent References:
| WO1999006991A1 | 1999-02-11 | |||
| WO1998038798A1 | 1998-09-03 |
Foreign References:
| JPH10336626A | 1998-12-18 | |||
| JP2002084339A | 2002-03-22 | |||
| EP1296479A1 | 2003-03-26 |
Other References:
See also references of EP 1633161A4
Attorney, Agent or Firm:
Miyazaki, Teruo (16th Kowa Bldg. 9-20, Akasaka 1-chome, Minato-k, Tokyo 52, JP)
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