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Radio image and sound signal transmission device and method

A technology for a sound signal and a transmission device, applied in the field of image and sound signal transmission devices, can solve problems such as the inability to allow simultaneous coexistence of multiple image and sound signal sources, reducing the convenience of image and sound signals, and the inability to allow simultaneous transmission of signals.

Inactive Publication Date: 2004-06-23
BENQ CORP
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Problems solved by technology

[0004] However, when it is applied to the wireless area network to transmit image and audio signals, due to the limited wireless bandwidth of the transmission in the wireless communication environment, the bit rate of the transmitted image and audio data will be limited by the limited transmission bandwidth. If CBR is used The transmission method cannot allow more signals to be transmitted at the same time on the limited transmission rate, and it cannot allow multiple video and audio signal sources to coexist in the same wireless area network at the same time, which reduces the transmission of video and audio signals in this wireless network. convenience

Method used

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  • Radio image and sound signal transmission device and method
  • Radio image and sound signal transmission device and method
  • Radio image and sound signal transmission device and method

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[0024] see figure 1 and figure 2 , figure 1 is a schematic diagram of the application environment of a preferred embodiment of the present invention, figure 2 yes figure 1 A schematic diagram of the wireless video and audio signal transmission device 20 in FIG. Such as figure 1 As shown, the present invention is a wireless video and audio signal transmission device 20 applied to a wireless area network 10 . The WLAN 10 is defined by a wireless communication protocol, and all devices in the WLAN 10 communicate with each other through the wireless communication protocol. The wireless communication protocol is a communication protocol selected from the group consisting of IEEE 802.11a communication protocol, IEEE 802.11b communication protocol, IEEE 802.11g communication protocol, and Home RF communication protocol.

[0025] Such as figure 1 As shown, the wireless image and sound signal transmission device 20 is used to receive the image and sound from a TV signal tuner ...

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Abstract

The present invention is one kind of sound and image signal transmission device for sound and image signal transmission in a radio LAN. Before transmission, one total transmission rate is determined. The sound and image signal transmission device has at least one set of compression specification, and when there is some signal input to the device, compression specification and compression ratio required by the image and sound signal are first judged and selected and the image and sound signal is then compressed in the selected compression specification and compression ratio to make the total transmission amount after being compressed in the preset total transmission rate range.

Description

technical field [0001] The invention relates to an image and sound signal transmission device, in particular to a wireless image and sound signal transmission device applied to a wireless area network. Background technique [0002] The playback formats of existing video and audio signals can be mainly divided into two types: Video Compact Disc (VCD) and Digital Video Disc (DVD). VCD is compressed in MPEG-1 format and transmits image and sound signals at a fixed transmission bit rate (Constant Bit Rate, CBR) of 1.2 Mbps. DVD uses MPEG-2 format compression to transmit high-quality image and sound signals with an average of 3.5Mbps and a maximum of 9.8Mbps variable bit rate (Variable Bit Rate, VBR). [0003] The biggest difference between DVD and VCD is the transmission bit rate. In MPEG-1, because it adopts the CBR transmission method, no matter whether the music (or image) played is complex or simple, the output bit rate is fixed at a certain value, and when the transmissio...

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Application Information

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IPC IPC(8): H04N19/136
Inventor 李昌鸿王志阳曾成得
Owner BENQ CORP
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