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Digital videocast system capable of mobile reception

A technology of digital TV broadcasting and digital TV, which is applied in the direction of analog security/charging system and gigahertz frequency band transmission. Good, low cost, low network requirements

Inactive Publication Date: 2006-04-26
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology

However, the working method of this system has the following disadvantages: it has high requirements for the mobile communication network that transmits the TV signal data stream, and when there are many visiting users, the transmission of data cannot be guaranteed, resulting in images, Intermittent sound and other phenomena, and due to the limitation of channel bandwidth, the clarity of the transmitted TV program code stream is limited, especially in the existing GSM network, this problem is particularly serious; the operation of the mobile communication network and the cost of end users are relatively high high

Method used

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  • Digital videocast system capable of mobile reception

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Embodiment Construction

[0013] like figure 1 , the system includes a satellite signal transmitting device, a signal transfer device, an encryption and program management device 6, a mobile communication network 7, and a mobile communication and TV receiving terminal 8.

[0014] In the satellite signal sending device, the TV program signal 1 is first compressed, according to the definition of the TV program and the bandwidth capacity of the signal transmitted by the satellite, according to any standard of MPEG-2, MPEG-4, AVS. Then, the TV signal 1 is sent to the coding modulation 2, channel coding such as symbol coding, interleaving, and forward error correction coding and RF signal QPSK modulation, and then sent to the transponder 3 of the satellite through the satellite transmitting antenna to carry out the satellite beam coverage area. Digital TV satellite broadcasting.

[0015] In view of the limitations of the receiving antenna of mobile communication and TV receiving terminals and the character...

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Abstract

The invention discloses a digital TV broadcast system for mobile receive, which comprises: the satellite signaling device modulates the TV program and sends to satellite transponder for broadcast; the signal differential device modulates the broadcast signal again and takes surface-wave digital TV broadcast. Wherein, there is traditional mobile communication function as well as receiving the surface-wave digital TV signal in receive terminal; terminal also receives key for enciphered program from management device to decipher the program. This invention has low require to network, well program quality, and low charge.

Description

Technical field [0001] The invention relates to a digital TV broadcasting system, in particular to a mobile receiving digital TV broadcasting system. Background technique [0002] In the existing system, such as China Unicom and China Mobile's smart phone watching TV program, generally through special processing of the TV program being broadcast, such as compressing the TV signal data into an MPEG-4 code stream, after The GPRS network of the Internet and the mobile communication system transmits it to the mobile receiving terminal, and displays it on the TV screen after the mobile receiving terminal decodes it. However, the working method of this system has the following disadvantages: it has high requirements for the mobile communication network that transmits the TV signal data stream, and when there are many visiting users, the transmission of data cannot be guaranteed, resulting in images, Intermittent sound and other phenomena, and due to the limitation of channel band...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/20H04N7/16
Inventor 马铁桥
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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