CN201282468Y - Digital mobile multimedia broadcast receiving device - Google Patents
Digital mobile multimedia broadcast receiving device Download PDFInfo
- Publication number
- CN201282468Y CN201282468Y CNU2008200596768U CN200820059676U CN201282468Y CN 201282468 Y CN201282468 Y CN 201282468Y CN U2008200596768 U CNU2008200596768 U CN U2008200596768U CN 200820059676 U CN200820059676 U CN 200820059676U CN 201282468 Y CN201282468 Y CN 201282468Y
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- microprocessor
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Abstract
The utility model relates to a device for receiving digital mobile multimedia broadcasts. The device comprises a keyboard, a display screen, an audio output, a program memory, a data memory, a battery, a multimedia microprocessor, a modem, a tuner and an antenna. The antenna receives CMMB (China Mobile Multimedia Broadcasting) radio-frequency signals of the digital mobile multimedia broadcast broadcasting technical system; the received signals are converted into I/Q signals through the tuner; the I/Q signals are demodulated to a compression media stream through the modem; the compression media stream is de-multiplexed to an H.264 video stream, an AAC (Advanced Audio Compression) audio current or service data; the H.264 video stream, the AAC audio current, and the service data is sent to the multimedia microprocessor to be decompressed and played. The multimedia microprocessor is an ARM microprocessor core. The utility mode effectively realizes the requests and indexes made by the CMMB relevant technical standards, and completes the engineered transformation from the standards to products.
Description
Technical field
The utility model relates to broadcasting television technology field, relates in particular to a kind of digital mobile multimedia broadcast television field.
Background technology
Mobile Multimedia Broadcasting be towards multiple mobile portable terminal device (mobile phone, PDA, notebook computer, digital camera etc.) broadcast, a kind of new broadcast television service form of TV, data broadcasting.As a kind of new form of propagating, Mobile Multimedia Broadcasting is worldwide just becoming an important service of radio and television.
China Broadcast ﹠ Television general bureau tests and appraises through discussion existing several technical systems, has determined the China mobile multi-media broadcasting technology system (CMMB) based on S-TIMI chnnel coding and modulation technique.The CMMB technical standard cover whole mobile multimedia broadcasting service system, complete skill system end to end.Comprise:
Broadcast channel, program distribution channel, multiplexing, electronic program guides, urgent broadcast, user management, encryption authorization, data broadcasting, satellite transmits (Ku), satellite cover (S), ground (UHF) single frequency network, ground (UHF) and augment repeater system, ground (S) single frequency network, ground (S) and augment repeater system, transmission and overlay network management, receiving terminal etc.
The major technique characteristics of CMMB
Adopt the power saving of timeslot-based frame structure support terminal
Adopting the support of OFDM modulation technique to move receives and single frequency network
Raising receptivity that employing LDPC encodes and the degree of depth interweaves
Adopt beacon to realize fast synchronously
Adopt the logic channel technology to realize professional flexible combination
Current, relevant department has issued a series of correlation technique standard about Mobile Multimedia Broadcasting (CMMB).But how to realize the technical standard that this is serial, still lack effective solution.
Summary of the invention
The purpose of this utility model provides a kind of realization CMMB standard techniques scheme.
Basic technical scheme of the present utility model is:
A kind of digital mobile multimedia broadcast receiving apparatus comprises keyboard, display screen, audio frequency output, program storage, data storage and battery, also comprises multimedia microprocessor, demodulator, tuner and antenna.
Described multimedia microprocessor ARM micro-processor kernel.
The technical solution of the utility model can effectively realize CMMB correlation technique standard requirement and index, has finished the engineering conversion of standard to product.
Description of drawings
Fig. 1 is a device theory of constitution block diagram of the present utility model
Embodiment
Below in conjunction with accompanying drawing 1, describe an embodiment of the technical solution of the utility model in detail.
Present embodiment adopts the TC7920S of Telechips as host CPU, and he is a ARM kernel, the application processor of 400MHz.This preparation implement has following key property:
-support special SIMD instruction, can accelerate the multimedia processing speed greatly.
-8 level production line instruction process.
-IPU (Image Processing Unit) accelerates color of image space conversion and convergent-divergent.
-abundant peripheral interface: lcd controller, USB Host/Client interface, sdram controller interface, Flash Memory interface, MMC/SD interface, audio frequency digital-to-analogue conversion, SPI interface, I2C interface, RealTime Clock, DMA, UART etc.
The front end of this receiving system scheme comprises tuner tuner and demodulator demodulator.Tuner Tuner will adopt the U wave band silicon chip tuner TUA9001 of company of Infineon.Demodulator Demodulator adopts the S301B of Telepath company.Antenna receives the CMMB radiofrequency signal, changes into by the tuner of Infineon to be i/q signal, and i/q signal is demodulated to compressed media stream by S301B, and demultiplexes into and be video flowing H.264, AAC audio stream and service data.Delivering to application processor TCC7920S by SDI0 or SPI interface then decompresses and plays.
This embodiment scheme can have 2 kinds of application models: Slave mode (auxilliary pattern) and Master mode (holotype).
Slave mode is meant that system is in the slave status in whole system, and it is the state of ACTIVE CONTROL system not, but action is made in the instruction of passive reception master control system.This application background is: there is ripe mobile phones design in cell phone manufacturer, they wish to add the CMMB mobile television receiving function in existing design, but existing mobile phone does not possess the ability of CMMB mobile TV decoding, so must add a CMMB television reception/decode system, they are shared LCD and show output.Show because share, need to add a communication channel between two systems and coordinate.This communication channel is generally the UART/RS232 serial ports.Two systems are linked up according to the CSCP agreement by serial ports, coordinate output and show and sound.
Under the Slave pattern, mobile module (Master) is responsible for receiving user's input, and control shows switches.Slave just makes action according to the instruction of mobile module is passive.
Slave Mode utility mode is as follows:
Use case 1: mobile phone uses pattern: acquiescence is operated in this pattern after mobile module (Master) start.System under this pattern (Slave) is in sleep state, and sound and demonstration are all carried out according to the original pattern of mobile phone, and this is consistent with the regular handset working method.
Use case 2:CMMB television mode.Under mobile phone use pattern, the user is if watch the CMMB TV, and then mobile module (Master) sends instructions to the Slave waken system by CSCP, and system enters the TV watching state and says the word and tells the mobile phone end to be ready to.Mobile module shows that LCD switch gives Slave, and sound channel switches to output channel.Just entered the CMMB state of televising this moment.
Use case 3: get back to the mobile phone user mode from the CMMB television mode: (such as backspace key) withdraws from TV watching if the user presses certain key, mobile module (Master) says the word and allows it quit work to (Slave), and demonstration and sound are switched to mobile phone state.
The related setting of search of Use case 4:CMMB television channel and CMMB: the UI of these settings is presented at mobile module (Master) and realizes, relevant setting is issued Slave by CSCP and gone to finish setting.
Under the Master Mode, CMMB becomes the main control unit of system.The application that Master mode is commonly used down has smart mobile phone and PMP/MP4.In smart mobile phone was used, corresponding to Slave mode, mobile module was a Slave equipment for system, is may command by interfaces such as serial ports.In PMP/MP4 uses, only need remove mobile module, and the broadcast support that adds multiple media formats gets final product.
Present embodiment has been realized the media product solution that the CMMB mobile TV is used.Can realize mobile TV, multiple products such as mobile TV MP4.Has following basic capacity: basic display unit is arranged, have the certain calculation ability, can do the decoding of audio frequency and video,, have basic interface can import audio frequency and video composite bit stream etc. such as the video decode of CIF size by software or hardware decoder.
Claims (2)
1, a kind of digital mobile multimedia broadcast receiving apparatus, comprise keyboard, display screen, audio frequency output, program storage, data storage and battery, it is characterized in that, also comprise the multimedia microprocessor, demodulator, tuner and antenna, described antenna receives China mobile multi-media broadcasting technology system CMMB radiofrequency signal, change into by tuner tuner and to be i/q signal, this i/q signal is demodulated to compressed media stream by described demodulator, and demultiplex into and be video flowing H.264, AAC audio stream and service data are delivered to described multimedia microprocessor by SDIO or SPI interface then and are decompressed and play.
2, digital mobile multimedia broadcast receiving apparatus as claimed in claim 1 is characterized in that, described multimedia microprocessor is the ARM micro-processor kernel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200596768U CN201282468Y (en) | 2008-06-13 | 2008-06-13 | Digital mobile multimedia broadcast receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200596768U CN201282468Y (en) | 2008-06-13 | 2008-06-13 | Digital mobile multimedia broadcast receiving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201282468Y true CN201282468Y (en) | 2009-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200596768U Expired - Fee Related CN201282468Y (en) | 2008-06-13 | 2008-06-13 | Digital mobile multimedia broadcast receiving device |
Country Status (1)
| Country | Link |
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| CN (1) | CN201282468Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223577A (en) * | 2010-04-15 | 2011-10-19 | 中兴通讯股份有限公司 | Terminal and method for realizing mobile television function |
-
2008
- 2008-06-13 CN CNU2008200596768U patent/CN201282468Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223577A (en) * | 2010-04-15 | 2011-10-19 | 中兴通讯股份有限公司 | Terminal and method for realizing mobile television function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20100613 |