Digital television ground broadcasting system receiver and method of supporting single/multiple carrier modes
A digital TV terrestrial and broadcasting system technology, applied in the field of digital information transmission, can solve problems such as unfavorable promotion of digital TV terrestrial broadcasting, achieve great practical value, reduce hardware complexity and cost, and save system resources
Active Publication Date: 2008-03-12
HISENSE VISUAL TECH CO LTD
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Problems solved by technology
According to the above analysis, two different sets of receivers are required to cope with the single / multi-carrier coexistence fusion mode. For end users, this will be a kind of repeated investment, which is not conducive to the promotion of digital TV terrestrial broadcasting
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[0025] FIG. 3 shows an embodiment of the structure of a receiver in a multi-mode digital TV terrestrial broadcasting system supporting single / multi-carrier simultaneously according to the present invention.
[0026] As shown in Figure 3, the data received from the antenna first passes through the tuner (high-frequency head) 11, and is modulated to a digital low intermediate frequency; then becomes a discrete digital signal through an analog-to-digital conversion (A / D) 12; then , the automatic gain control module 13 completes the stabilization of the data amplitude; then, the synchronization module 14 performs carrier synchronization and clock synchronization, and the demodulation module 15 demodulates the data to the baseband; then the baseband data is first sent to the time domain equalizer 16. If the system has just been initialized this moment, and the single / multi-carrier judgment and solution system information module 32 has not yet judged the carrier pattern, then the tim...
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The present invention provides a receiver and a method for the ground broadcast transmission system of a digital television, which are the structure and the method pointed to a receiving terminal system under the multi model of a single carrier wave and multi carrier wave transmission mode coexistence. Through a rational reselection of the interfusion point on the receiving terminal of the single carrier wave disposing mode and the multi carrier wave disposing mode, data determination for the time domain / frequency domain, determination for the system information, and disposition for the multi carrier wave branch is added based on the basic structure of the original single carrier wave receiver, when the single / multi carrier wave mode is switched automatically, the determination and the receiving of the single / multi carrier wave in the same receiver can be realized by controlling the selection of the different single / multi carrier wave disposing data branch.
Description
technical field [0001] The invention belongs to the field of digital information transmission, and in particular relates to the structure and corresponding method of a receiver in a digital TV terrestrial broadcasting transmission system supporting single / multi-carrier modes at the same time. Background technique [0002] There are many transmission methods for modern digital TV broadcasting. According to different transmission media, the three main transmission methods are terrestrial wireless broadcasting, cable broadcasting and satellite broadcasting. According to different definition requirements, digital TV can be divided into high-definition TV and standard-definition TV. According to different application occasions, it can be divided into fixed receiving video service, mobile portable receiving video service, high-speed mobile receiving video and data service, etc. Currently, digital TV transmission standards are still being perfected. [0003] There are three estab...
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Login to View More IPC IPC(8): H04N5/44H04N7/04H04N7/06
Inventor 张文军管云峰梁伟强何大治吴松炎吴子彧范莹莹
Owner HISENSE VISUAL TECH CO LTD