Radio video transmission system and method

• US 7,509,090 B2
• Filed: 04/15/2004
• Issued: 03/24/2009
• Est. Priority Date: 04/15/2003
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Yamauchi, Masahiro
• Primary Examiner(s): TRINH, TAN H
• Application Number:
  US10/553,203
• Publication Number:
  US 20060227215A1
• Time in Patent Office: 1,804 Days
• Field of Search: 455/3.06, 455/420, 455/423, 455/9, 455/41.2, 455/504, 455/566, 370/468, 375/240.12, 375/240.13, 348/193, 348/123, 348/723, 348/423.1, 348/14.08
• US Class Current: 455/3.06
• CPC Class Codes: H04L 1/0014 by adapting the source coding
• CPC Class Codes: H04L 1/0023 characterised by the signalling

Abstract

The present invention provides a system and method for radio video transmission which switches a radio frequency band or a compression rate for video data to enable appropriate video transmission even if a radio environment is degraded. A pair of a transmitter and a receiver transmits video data in the radio environment. The receiver periodically transmits a status message to the transmitter. If the transmitter fails to receive reception of the periodically transmitted status message, the failure is used as a trigger to cause the transmitter to switch the channel (radio frequency band) or the video data compression rate. It is therefore possible to switch the radio frequency band or video data compression rate for the transmitter and receiver even if the radio environment is degraded.

Claims

1. A radio video transmission system which transmits video data from a transmitter to a receiver by radio, the radio video transmission system comprising:

a detecting means for detecting interruption of communication of data periodically transmitted by the receiver; and

a channel switching means for switching a channel through which video data is transmitted to the receiver, in response to the detection, by the detecting means, of the interruption of the communication, wherein

the channel switching unit comprises a timer that counts a channel switching time to set a power saving mode when a predetermined time has been clocked.

2. The radio video transmission system according to claim 1, wherein the data periodically transmitted by the receiver is transmitted data comprising a status of reception, by the receiver, of the video data transmitted by the transmitter, the transmitted data being periodically transmitted from the receiver to the transmitter by reception status transmitting means.

3. The radio video transmission system according to claim 2, wherein the channel switching unit comprises a timer that counts a channel switching time to set a power saving mode when a predetermined time has been clocked.

4. The radio video transmission system according to claim 2, wherein at least one of the receiver and transmitter is a communication apparatus connected to AV equipment by inter-equipment communication.

5. The radio video transmission system according to claim 1, wherein at least one of the receiver and transmitter is a communication apparatus connected to AV equipment by inter-equipment communication.

6. The radio video transmission system according to claim 1, wherein at least one of the receiver and transmitter is a communication apparatus connected to AV equipment by inter-equipment communication.

7. A method for radio video transmission which transmits video data from a transmitter to a receiver by radio, the method comprising:

causing a receiver to periodically transmit video data;

detecting interruption of communication of data periodically transmitted by the receiver; and

switching a channel through which video data is transmitted to the receiver, when the interruption of the data communication with the receiver is detected, wherein

the channel switching unit comprises a timer that counts a channel switching time to set a power saving mode when a predetermined time has been clocked.