WIRELESS TRANSMISSION SYSTEM

• US 20110228715A1
• Filed: 10/21/2009
• Published: 09/22/2011
• Est. Priority Date: 12/01/2008
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Tsuji, Keisuke, Imanishi, Seiji, Ohmae, Ryosuke
• Granted Patent: US 8,565,252 B2
• Time in Patent Office: Days
• US Class Current: 370/310
• CPC Class Codes: H04N 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/2402 Monitoring of the downstream path of the transmission network, e.g. bandwidth available traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876
• CPC Class Codes: H04N 21/2404 Monitoring of server processing errors or hardware failure error or fault detection G06F11/07; monitoring in general G06F11/30
• CPC Class Codes: H04N 21/43635 HDMI
• CPC Class Codes: H04N 21/43637 involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114
• CPC Class Codes: H04N 21/442 Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk arrangements for monitoring broadcast services or broadcast-related services H04H60/29; arrangements for identifying or recognising characteristics with a direct linkage to broadcast information H04H60/35; monitoring of user activities for profile generation for accessing a video database G06F16/739; monitoring in wireless networks H04W24/00
• CPC Class Codes: H04N 21/631 Multimode Transmission, e.g. transmitting basic layers and enhancement layers of the content over different transmission paths or transmitting with different error corrections, different keys or with different transmission protocols
• CPC Class Codes: H04N 21/6338 directed to network

Abstract

Provided is a wireless transmission system which can transmit data accompanying video/audio by a different transmission method depending on the characteristic of the data in a wireless transmission environment where the transmission band is narrow and a transmission error is easily caused. The wireless transmission system includes: a wireless receiver (3) connected to a sink device (4); and a wireless transmitter (2) connected to a source device (1). A wireless communication is performed between the wireless receiver (3) and the wireless transmitter (2) so that video and audio are outputted from the source device (1) to the sink device (4). The wireless receiver (3) and/or the wireless transmitter (2) categorizes the data accompanying the video and the audio in accordance with the characteristic thereof and transmits the accompanying data by using a different transmission method depending on the categorization.

Claims

1. A wireless transmission system comprising:

a first wireless communication device connected to a display device; and

a second communication device connected to a video output device, the wireless transmission system outputting video and audio from the video output device to the display device by performing wireless communication between the first wireless communication device and the second wireless communication device, wherein

the first wireless communication device and/or the second wireless communication device categorize associated data associated with the video and audio depending on the characteristics thereof and transmit the associated data in different transmission modes for respective categories by wireless.

2. The wireless transmission system of claim 1, wherein the first wireless communication device and/or the second wireless communication device include buffers for each category of the associated data.

3. The wireless transmission system of claim 1, wherein the presence/absence of retransmission and the presence/absence of transmission order rearrangement are differentiated for the transmission modes.

4. The wireless transmission system of claim 1, wherein the first wireless communication device and/or the second wireless communication device include a plurality of wired transmission lines depending on characteristics of the associated data, and the first wireless communication device and/or the second wireless communication device categorize the associated data for each of the wired transmission lines.

5. The wireless transmission system of claim 4, wherein the first wireless communication device and/or the second wireless communication device categorize the plurality of the associated data based on header information thereof when a plurality of associated data having different characteristics is transmitted through one wired transmission line.

6. The wireless transmission system of claim 4, wherein

the display device is connected through HDMI to the first wireless communication device and the video output device is connected through HDMI to the second wireless communication device,

a plurality of the wired transmission lines are made up of a TMDS line, a CEC line, a DDC line, and an HPD line of HDMI standard,

the associated data includes DIP transmitted through the TMDS line, a CEC message transmitted through the CEC line, an HDCP authentication message transmitted through the DDC line, and a hot plug signal transmitted through the HPD line, and

the categories are divided into a first type including the DIP, a second type including the CEC message and the HDCP authentication message, and a third type including the hot plug signal.

7. The wireless transmission system of claim 6, wherein with regard to the DIP, the second wireless communication device categorizes data for adjusting image quality or audio that changes during watching/listening video and audio into the first type and data that changes at the time of switching a video output source into the third type.

8. The wireless transmission system of claim 6, wherein the transmission mode of the first type is a mode in which retransmission and transmission order rearrangement are not performed, the transmission mode of the second type is a mode in which retransmission is performed while transmission order rearrangement is not performed, and the transmission mode of the third type is a mode in which retransmission and transmission order rearrangement are performed, and a mode for updating old associated data before a change in state remaining in a buffer.