CN1764274A - Digital videocast system capable of mobile reception - Google Patents
Digital videocast system capable of mobile reception Download PDFInfo
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- CN1764274A CN1764274A CN 200410040910 CN200410040910A CN1764274A CN 1764274 A CN1764274 A CN 1764274A CN 200410040910 CN200410040910 CN 200410040910 CN 200410040910 A CN200410040910 A CN 200410040910A CN 1764274 A CN1764274 A CN 1764274A
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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
Affiliated technical field
The present invention relates to the digital television broadcasting system of a kind of digital television broadcasting system, particularly a kind of removable reception.
Background technology
In existing system, in the scheme that the smart mobile phone of releasing as CHINAUNICOM and China Mobile televiews, generally handle especially by the TV programme that will broadcast, for example TV signal data is collapsed into the code stream of MPEG-4, GPRS network through the Internet and mobile communication system is sent to mobile receiving terminal, is presented on the video screen after mobile receiving terminal is with its decoding.But, this system operating mode has following shortcoming: the mobile communication network to the transmitting television signals data code flow has higher requirement, at calling party more for a long time, can't guarantee the transmission of data, phenomenons such as image, audio discontinuity appear in the program that causes finally watching the user, and because the restriction of channel width, the definition of the TV programme code stream of transmission is restricted, especially in existing GSM network, this problem is especially serious; The operation of mobile communications network and terminal use's expense are higher.
Summary of the invention
Purpose of the present invention is exactly the digital television broadcasting system that a kind of removable reception will be provided.Network requirement is low in this system, television program quality good, the operation of mobile communications network and terminal use's expense is low.
When realizing purpose of the present invention, taked following technological means:
In this system, include satellite-signal dispensing device, signal difference rotary device, encryption and program device, mobile communication network, mobile communication and television receive terminal.
The satellite-signal dispensing device sends to the transponder of satellite after with the TV programme signal coded modulation, and Digital Television satellite broadcasting is carried out in the satellite beams overlay area.
The signal difference rotary device carries out the recompile modulation after Digital Television satellite broadcasting programme signal is received, and carries out the surface wave digital television broadcasting in the frequency range of regulation.
Mobile communication and television receive terminal had both had traditional functionality mobile communication, can receive the surface wave digital television signal that is sent by the signal difference rotary device again.
For the ciphered program of wherein broadcasting, encryption and program device transmit key by mobile communication network, after mobile communication and television receive terminal receive this key, carry out the deciphering of program according to this key.
In the present invention because the satellite and the ground-wave television broadcast network of the transmission network using of TV programme signal, therefore just low to the network requirement of mobile communication, avoided of the restriction of mobile communication channel width to TV programme, television program quality is good like this, and the operation of mobile communications network and terminal use's expense is also low simultaneously.
Description of drawings
Fig. 1 is the system block diagram of present embodiment;
Fig. 2 is the circuit block diagram of mobile communication and television receive terminal in the present embodiment.
Embodiment
As Fig. 1, in this system, include satellite-signal dispensing device, signal difference rotary device, encryption and program device 6, mobile communication network 7, mobile communication and television receive terminal 8.
In the satellite-signal dispensing device, at first TV programme signal 1 is compressed, according to the definition of TV programme and the signal bandwidth capabilities of satellite transmission, compress during compression by MPEG-2, MPEG-4, the arbitrary standard of AVS.Then TV signal 1 is sent into coded modulation 2, carry out symbolic coding, interweave, chnnel coding and RF signal QPSK modulation such as forward error correction coding, send to the transponder 3 of satellite again through satellite transmitting antenna, Digital Television satellite broadcasting is carried out in the satellite beams overlay area.
In view of the multipath of the restriction of mobile communication and television receive terminal reception antenna and mobile reception environment disturbs and characteristic such as frequency decline, need use signal difference rotary device.In the signal difference rotary device, after reception antenna receives Digital Television satellite broadcasting programme signal via satellite, carry out the recompile modulation by receiving modulation 4, use the Single Frequency Network mode of COFDM then, carry out the surface wave digital television broadcasting in the frequency range of regulation by launching 5.Use the Single Frequency Network mode of COFDM, can make things convenient for the configuration of poor commentaries on classics base station and the design of mobile communication and television receive terminal, and make mobile communication and television receive terminal also be applicable to reception the ordinary numbers television terrestrial broadcasting.
Mobile communication and television receive terminal had both had traditional functionality mobile communication, the surface wave digital television signal that can receive ordinary numbers television terrestrial broadcasting signal again or be sent by the signal difference rotary device.As Fig. 2, in mobile communication and television receive terminal, after of the TV signal reception of micro-television antenna with terrestrial broadcasting, send into tuner and TV demodulation module 12 carries out the tuning and demodulation process of program, obtain television video frequency signal and audio signal, television video frequency signal is sent into demonstration processing section and LCD screen 11, processing television signals is become to be fit to the QVGA form of lcd screen demonstration and shows that the audio signal that demodulation is obtained is delivered to loud speaker 15 or exported by earphone simultaneously.The control of tuner and TV demodulation module 12 is finished by the MCU in Base-Band Processing part and the control section 10, and the user carries out button operation by input module 14, finishes functions such as the tuning and program searching of program.The realization of functionality mobile communication is identical with regular handset, and the reception of signal and emission are undertaken by RF part 9 and antenna for mobile phone, and its Signal Processing and control are finished by DSP and the MCU in Base-Band Processing part and the control section 10.The electric power system of whole mobile communication and television receive terminal increases the power pack to tuner and TV demodulation module 12 on the power supply 13 of former regular handset.The TV programme signal processing section uses the MCU in Base-Band Processing part and the control section 10 to control, and increases the control to tuner and TV demodulation module 12 in its Control Software, and increase content corresponding in its man-machine interface.
The reception of existing ordinary numbers television encryption broadcasting need be disposed SMARTCARD or CA module at user side, this has not only increased the cost of receiver, and there is hidden danger in the fail safe of encryption system, is inconvenient to realize the charge method of carrying out according to the program time of watching.
And in the present embodiment, for the ciphered program of wherein broadcasting, encryption and program device transmit key by mobile communication network, after mobile communication and television receive terminal receive this key, carry out the deciphering of program according to this key.
Transmission to key, use the encryption load mode of the data in mobile phone such as A5 cryptographic algorithm of GSM to carry out, corresponding cryptographic algorithm and password then are sent in mobile communication and the television receive terminal by mobile communication network by encryption and program device, mobile communication and television receive terminal are decrypted key earlier according to this cryptographic algorithm and password, carry out the deciphering of program according to the key that solves again.
When key need upgrade, transmit key updating prompting sign by mobile communication network to mobile communication and television receive terminal by encryption and program device, also affix program key version switching mark in the code stream information table of ciphered program simultaneously, mobile communication and television receive terminal are asked for new program key by mobile communication network to encryption and program device according to this prompting sign, and utilize program key version switching mark to finish synchronous switching.Encryption and program device are watched the calculating and the management of expense to the situation of obtaining of key by mobile communication and television receive terminal.Watch that the calculating of expense and the mode of management are to carry out according to user's time of watching.
Therefore pass through present embodiment, can not need be mobile communication and television receive terminal configuration SMARTCARD or CA module at user side, thereby reduced the cost of receiver, and owing to key can upgrade at any time, cipher key delivery has also added close, therefore the fail safe of encryption system is relatively good, and has realized the charge method of carrying out according to the program time of watching easily.
Claims (8)
1. the digital television broadcasting system of a removable reception includes satellite-signal dispensing device, signal difference rotary device, encryption and program device, mobile communication network, mobile communication and television receive terminal, it is characterized in that:
The satellite-signal dispensing device sends to the transponder of satellite after with the TV programme signal coded modulation, and Digital Television satellite broadcasting is carried out in the satellite beams overlay area;
The signal difference rotary device carries out the recompile modulation after Digital Television satellite broadcasting programme signal is received, and carries out the surface wave digital television broadcasting in the frequency range of regulation;
Mobile communication and television receive terminal had both had traditional functionality mobile communication, can receive the surface wave digital television signal that is sent by the signal difference rotary device again;
For the ciphered program of wherein broadcasting, encryption and program device transmit key by mobile communication network, after mobile communication and television receive terminal receive this key, carry out the deciphering of program according to this key.
2, the digital television broadcasting system of a kind of removable reception according to claim 1, it is characterized in that described key transmits the employing cipher mode and carries out, corresponding cryptographic algorithm and password then are sent in mobile communication and the television receive terminal by mobile communication network by encryption and program device, mobile communication and television receive terminal are decrypted key earlier according to this cryptographic algorithm and password, carry out the deciphering of program according to the key that solves again.
3, the digital television broadcasting system of a kind of removable reception according to claim 2, described key it is characterized in that when need upgrade, transmit key updating prompting sign by mobile communication network to mobile communication and television receive terminal by encryption and program device, also affix program key version switching mark in the code stream information table of ciphered program simultaneously, mobile communication and television receive terminal are asked for new program key by mobile communication network to encryption and program device according to this prompting sign, and utilize program key version switching mark to finish synchronous switching.
4, the digital television broadcasting system of a kind of removable reception according to claim 3 is characterized in that encrypting and the program device is watched the calculating and the management of expense to the situation of obtaining of key by mobile communication and television receive terminal.
5, the digital television broadcasting system of a kind of removable reception according to claim 3 is characterized in that the calculating of the expense of watching and the mode of management are to carry out according to user's time of watching.
6, the digital television broadcasting system of a kind of removable reception according to claim 1, it is characterized in that the satellite-signal dispensing device at first compresses TV programme signal, and then by sending to the transponder of satellite after the coded modulation, according to the definition of TV programme and the signal bandwidth capabilities of satellite transmission, compress during compression by MPEG-2, MPEG-4, the arbitrary standard of AVS.
7, the digital television broadcasting system of a kind of removable reception according to claim 1 is characterized in that the signal difference rotary device uses the Single Frequency Network mode of COFDM that digital telstar broadcast program is differed to transmit and penetrates.
8, the digital television broadcasting system of a kind of removable reception according to claim 7 is characterized in that mobile communication and television receive terminal also are applicable to the reception to the ordinary numbers television terrestrial broadcasting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410040910 CN1764274A (en) | 2004-10-23 | 2004-10-23 | Digital videocast system capable of mobile reception |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410040910 CN1764274A (en) | 2004-10-23 | 2004-10-23 | Digital videocast system capable of mobile reception |
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| Publication Number | Publication Date |
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| CN1764274A true CN1764274A (en) | 2006-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410040910 Pending CN1764274A (en) | 2004-10-23 | 2004-10-23 | Digital videocast system capable of mobile reception |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008086714A1 (en) * | 2006-12-30 | 2008-07-24 | Zte Corporation | A method and system for realizing safety of cipher key in multi-network fusion mobile multi-media broadcasting system |
| CN101202898B (en) * | 2006-12-15 | 2011-02-16 | 黄金富 | Method and system for returning satellite television ideology control power to each country to manage |
| CN101304494B (en) * | 2007-05-10 | 2012-01-25 | 日本先锋公司 | Method and system for data communication of digital television |
| CN113179425A (en) * | 2020-11-16 | 2021-07-27 | 北京路安世纪文化发展有限公司 | High-speed digital television signal transmission method |
| CN113891169A (en) * | 2021-09-23 | 2022-01-04 | 广州长嘉电子有限公司 | Display method and device based on satellite signal and television interaction |
-
2004
- 2004-10-23 CN CN 200410040910 patent/CN1764274A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202898B (en) * | 2006-12-15 | 2011-02-16 | 黄金富 | Method and system for returning satellite television ideology control power to each country to manage |
| WO2008086714A1 (en) * | 2006-12-30 | 2008-07-24 | Zte Corporation | A method and system for realizing safety of cipher key in multi-network fusion mobile multi-media broadcasting system |
| CN101304494B (en) * | 2007-05-10 | 2012-01-25 | 日本先锋公司 | Method and system for data communication of digital television |
| CN113179425A (en) * | 2020-11-16 | 2021-07-27 | 北京路安世纪文化发展有限公司 | High-speed digital television signal transmission method |
| CN113891169A (en) * | 2021-09-23 | 2022-01-04 | 广州长嘉电子有限公司 | Display method and device based on satellite signal and television interaction |
| CN113891169B (en) * | 2021-09-23 | 2023-08-15 | 广州长嘉电子有限公司 | Display method and device based on satellite signal and television interaction |
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