Patent US20060258291A1 successfully refreshed from Google Patents.
US20060258291A1
Expired / Lapsed
US
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Radio communication device, radio communication system, wireless av system, radio transmission method, operation control program, and recording medium containing the program
Assignee: Sharp Corp
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Filing: 2004-04-19
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Granted: —
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Expires: 2024-04-19
Abstract
Abstract A radio communication system according to the present invention includes a video/audio transmitter ( 1 ) and a video/audio receiver ( 2 ) for transmission/reception of data including video data and audio data at a predetermined bit rate. The video/audio receiver ( 2 ) has an error information generation section ( 18 ) for detecting a communication state according to a signal from the video/audio transmitter ( 1 ). The video/audio transmitter ( 1 ) has a transmission section ( 6 ) for transmitting data while controlling to change the bit rate according to the communication state detected by the video/audio receiver ( 2 ). Unless the communication state satisfies a predetermined criterion, the transmission section ( 6 ) temporarily lowers the bit rate for transmitting the data to the video/audio receiver ( 2 ). Thus, even when the communication state deteriorates, it is possible to minimize deterioration of the video and audio data and transmit data without lowering the quality of the entire video and audio transmitted.
Inventors
- 👤 Masashi Nakata
- 👤 Takafumi Chishiro
- 👤 Kenzo Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:14
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/0001; H04L1/0015; H04L1/0002; H04L1/0016; H04L1/12; H04L1/16; H04L1/18; H04L1/1825; H04L1/1867; H04L1/1874; H04L1/1877; H04N; H04N19/00; H04N19/10; H04N19/102; H04N19/115; H04N19/134; H04N19/164; H04N19/166; H04N19/60; H04N19/61; H04L1/0017; H04L1/0033; H04L1/0035
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
1 . A radio communication device for transmission of data including video data and audio data at a predetermined bit rate, comprising: a communication state detection section for detecting a communication state, according to a signal from a sender; and a data transmission section for transmitting the data while controlling to change the bit rate according to the communication state detected by the communication state detection section, wherein unless the communication state detected by the communication state detection section satisfies a predetermined criterion, the data transmission section temporarily lowering the bit rate for transmitting the data, and then increases the bit rate at regular time intervals and increases the number of times of retransmission of data to a transmitter end.
Claim 2
Dependent Claim
120 words
1 . A radio communication device for transmission of data including video data and audio data at a predetermined bit rate, comprising: a communication state detection section for detecting a communication state, according to a signal from a sender; and a data transmission section for transmitting the data while controlling to change the bit rate according to the communication state detected by the communication state detection section, wherein unless the communication state detected by the communication state detection section satisfies a predetermined criterion, the data transmission section temporarily lowering the bit rate for transmitting the data, and then increases the bit rate at regular time intervals and increases the number of times of retransmission of data to a transmitter end.
Claim 3
Dependent Claim
3 words
2 . (canceled)
Claim 4
Dependent Claim
3 words
2 . (canceled)
Claim 5
Dependent Claim
79 words
3 . The radio communication device according to claim 1 , further comprising: a setting value storing section for storing setting values which are respectively associated with bit rates and numbers of times of retransmission of data, the data transmission section selecting, based on the detected communication state, a setting value stored in the setting value storing section, and transmitting the data at the bit rate and the number of times of retransmission corresponding to the selected setting value.
Claim 6
Dependent Claim
34 words
4 . The radio communication device according to claim 1 , wherein: the video data and audio data are transmitted as an MPEG stream complying with an MPEG (Motion Picture Experts Group) coding system.
Claim 7
Dependent Claim
162 words
5 . A radio communication system including a transmitter and a receiver for transmission/reception of data including video data and audio data at a predetermined bit rate, the receiver comprising: a communication state detection section for judging errors in the data received from the transmitter and detecting a communication state according to the judged result; and an error information transmission section for transmitting the communication state detected by the communication detection section as error information to the transmitter, and the transmitter comprising: a data transmission section for transmitting the data while controlling to change the bit rate according to the communication state detected by the communication state detection section, wherein unless the communication state detected by the communication state detection section satisfies a predetermined criterion, the data transmission section temporarily lowers the bit rate for transmitting the data, and then increases the bit rate at regular time intervals and increases the number of times of retransmission of data to a transmitter end.
Claim 8
Dependent Claim
162 words
5 . A radio communication system including a transmitter and a receiver for transmission/reception of data including video data and audio data at a predetermined bit rate, the receiver comprising: a communication state detection section for judging errors in the data received from the transmitter and detecting a communication state according to the judged result; and an error information transmission section for transmitting the communication state detected by the communication detection section as error information to the transmitter, and the transmitter comprising: a data transmission section for transmitting the data while controlling to change the bit rate according to the communication state detected by the communication state detection section, wherein unless the communication state detected by the communication state detection section satisfies a predetermined criterion, the data transmission section temporarily lowers the bit rate for transmitting the data, and then increases the bit rate at regular time intervals and increases the number of times of retransmission of data to a transmitter end.
Claim 9
Dependent Claim
32 words
6 . A wireless AV (audio visual) system for connecting plural radio communication devices via radio networks, wherein: the radio communication device is the radio communication device according to claim 1 .
Claim 10
Dependent Claim
111 words
7 . A radio transmission method for transmission of data including video data and audio data at a predetermined bit rate, comprising: a first step of detecting a communication state, according to a signal from a sender; and a second step of transmitting the data while controlling to change the bit rate, according to the communication state detected in the first step, wherein in the second step, unless the communication state satisfies a predetermined criterion, the bit rate is temporarily lowered, and then the bit rate is increased at regular time intervals and the number of times of retransmission of data to a transmitter end is increased for transmitting the data.
Claim 11
Dependent Claim
111 words
7 . A radio transmission method for transmission of data including video data and audio data at a predetermined bit rate, comprising: a first step of detecting a communication state, according to a signal from a sender; and a second step of transmitting the data while controlling to change the bit rate, according to the communication state detected in the first step, wherein in the second step, unless the communication state satisfies a predetermined criterion, the bit rate is temporarily lowered, and then the bit rate is increased at regular time intervals and the number of times of retransmission of data to a transmitter end is increased for transmitting the data.
Claim 12
Dependent Claim
30 words
8 . A control program for operating the radio communication device according to claim 1 , wherein: the control program is for causing a computer to serve as each section.
Claim 13
Dependent Claim
16 words
9 . A computer readable recording medium storing the control program according to claim 8 .
Claim 14
Dependent Claim
34 words
10 . The radio communication device according to claim 3 , wherein: the video data and audio data are transmitted as an MPEG stream complying with an MPEG (Motion Picture Experts Group) coding system.
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