Vehicle-mounted CMMB (China Mobile Multimedia Broadcasting) terminal
A terminal and metal sheet technology, applied in the multimedia field, can solve problems such as troublesome installation, reducing aesthetics, and affecting user experience, and achieve the effect of enhancing aesthetics, low operating frequency, and improving user experience
Active Publication Date: 2012-11-28
南通云动汽车装备有限公司
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Problems solved by technology
[0004] The inventor found during the research and practice of the existing technology that the antenna of the existing vehicle-mounted CMMB device mainly uses an external rod antenna, which reduces the aesthetics and is troublesome to install, which affects the user experience
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[0020] A vehicle-mounted CMMB terminal provided by an embodiment of the present invention includes a receiving unit for demodulating digital TV radio frequency signals and outputting audio and video data streams; decoding the audio and video data streams output by the receiving unit, and outputting corresponding audio and video a signal processing unit; and at least one antenna connected to the receiving unit. The vehicle-mounted CMMB terminal provided by the embodiment of the present invention receives the audio and video signals output by the processing unit through a built-in or external playback unit, and outputs corresponding digital TV sound and picture.
[0021] The antenna provided by the embodiment of the present invention is as figure 1 and figure 2 As shown, the antenna of the present invention includes a dielectric substrate 1, a first metal sheet 4 and a second metal sheet 7 attached to the opposite surfaces of the dielectric substrate 1, a first feeder 2 is arr...
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The invention relates to a vehicle-mounted CMMB (China Mobile Multimedia Broadcasting) terminal. The terminal comprises a receiving unit, a processing unit and at least an antenna, wherein the receiving unit is used for demodulating RF (radio frequency) signals of a digital TV and outputting audio and video data streams; the processing unit is used for decoding the audio and video data streams output by the receiving unit and outputting corresponding audio and video signals; each antenna is connected with the receiving unit and comprises a dielectric substrate, a first metal sheet and a second metal sheet; the first and second metal sheets are adhered to two opposite surfaces of the dielectric substrate; a first feeder is arranged around the first metal sheet; a second feeder is arranged around the second metal sheet; the first and second feeders are respectively fed into the first and second metal sheets by way of coupling; a first microgroove structure and a second microgroove structure are hollowed on the first and second metal sheets respectively; and the first feeder is electrically connected with the second feeder. The aesthetics of the vehicle-mounted CMMB terminal is enhanced and the user experience is improved.
Description
technical field [0001] The invention belongs to the field of multimedia technologies, and in particular relates to a vehicle-mounted CMMB terminal. Background technique [0002] CMMB (China Mobile Multimedia Broadcasting, China Mobile Multimedia Broadcasting) system uses high-power S-band satellite signals to cover the whole country, and uses ground supplementary transponders to forward satellite signals at the same frequency and content at the same time. Backhaul channel to form a mobile multimedia broadcasting network combining one-way broadcasting and two-way interaction. After the ground launch center sends the signal to the S-band geostationary satellite, the geostationary satellite forwards the received signal, and the forwarded S-band signal is directly received by the receiving terminal on the ground, or it can be processed by the supplementary transponder and then received by the ground. The terminal receives it. The satellite also sends the signal to the suppleme...
Claims
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IPC IPC(8): H04N21/414H01Q1/24H01Q1/38
Inventor 刘若鹏徐冠雄
Owner 南通云动汽车装备有限公司