CN2798447Y

CN2798447Y - Multimetia mobile terminal

Info

Publication number: CN2798447Y
Application number: CNU2005200340743U
Authority: CN
Inventors: 唐食明; 邓文科
Original assignee: Sichuan Changhong Electric Co Ltd
Current assignee: Sichuan Changhong Electric Co Ltd
Priority date: 2005-04-30
Filing date: 2005-04-30
Publication date: 2006-07-19
Anticipated expiration: 2015-04-30

Abstract

The utility model provides a multimedia mobile terminal, which relates to a television technique, particularly a digital television technique. The utility model comprises a tuner part, an OFD demodulation part, a path decoding part, an audio and video decoding part, an audio and video output part and a power supply part, wherein the tuner part is used for accomplish low/ high frequency amplification, automatic gain control and down-conversion, and the tuner part can form and amplify intermediate frequency signals. The OFDM demodulation part which can accomplish OFMD demodulation, and the OFDM demodulation part comprises IFFT-1 process, QAM/QPSK demodulation process, parallel and serial conversion process, an RS decoding process and other processes so as to form a TS flow. The path decoding part is used for protocol unsealing and data correction. The audio and video decoding part can decode audio and video according to decompression algorithm, wherein the tuner part is connected with the OFDM demodulation part which is connected with the path demodulation part, the path demodulation part is connected with the audio and video decoding part, and the audio and video decoding part is connected with the audio and video output part. The utility model can conveniently accomplish watching digital television programs in a moving stage, and user cost is low.

Description

Multimedia mobile terminal

Technical field

The utility model relates to TV tech, particularly digital television techniques.

Background technology

Present personal multi-media terminal class is numerous, as personal digital assistant PDA popular on the market, palmtop PC, PMP (portable electronic device) etc.Digital media content wherein all is placed on the jumbo storage medium (Flash ROM or HardDisk) in advance, and at first need can be watched after importing to the individual media terminal by PC before watching.Because be subjected to the restriction of storage medium capacity and PC transmission speed, the user can only store multimedia sound, the video frequency program of fixed capacity in advance, and the plenty of time that need expend change and transmit, very inconvenient.

As another background technology, some mobile communication terminal (mobile phone) provides the online browsing function based on the GPRS transmission technology, as concrete an application, and can be by the online video frequency program of watching.Its weak point is, because the transmitted in both directions characteristics of mobile communication technology, because cause influence such as go offline is watched, and user's expense is also very high easily.

The utility model content

Technical problem to be solved in the utility model is, a kind of multimedia mobile terminal is provided, can make things convenient for, the real-time digital television program of watching, and can programs stored.

The technical scheme that the utility model solve the technical problem employing is, a kind of multimedia mobile terminal is provided, and comprising: tuning part, be used to finish that low/high frequency amplifies, automatic gain control, down-conversion, and form intermediate-freuqncy signal and amplify; The OFDM demodulation is finished in OFDM (OFDM modulation) demodulation part, comprises a series of processing such as IFFT-1 processing, QAM/QPSK demodulation, also string conversion, RS decoding, forms TS stream; The channel-decoded part is used for the agreement deblocking and the adjustment of data; The audio/video decoding part, according to decompression algorithm to audio/video decoding; The audio frequency and video output; Power unit.

Tuning part is connected with the OFDM demodulation part, and the OFDM demodulation part is connected with the passage demodulation part, and the passage demodulation part partly is connected with audio/video decoding, and the audio/video decoding part is connected with the audio frequency and video output.

The utility model also comprises storage area, and described storage area is connected with the passage demodulation part.Also comprise the network service part, described network service partly provides the data communication network interface.

Also comprise the man-machine interaction part, constitute by control panel and display circuit.

The beneficial effects of the utility model are, can be implemented in easily under the mobile status and watch digital television program, and need not through mobile communications network, and user effort is cheap.

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Description of drawings

Fig. 1 is a module frame chart of the present utility model.

Fig. 2 is a hardware configuration schematic diagram of the present utility model.

Embodiment

Referring to Fig. 1, the digital television signal that receives the DVB-H standard with terminal is that example is described the signal processing flow block diagram, and the surface wave acceptance criteria of using other still is suitable for, and is only slightly different in the signal demodulation part.Now just concrete link is described below:

1. tuner pack

This part is mainly finished and is hanged down high frequency amplification, automatic gain control, down-conversion, forms intermediate-freuqncy signal and amplification.

2.OFDM demodulation part

This part is mainly finished the OFDM demodulation, comprises a series of processing such as IFFT-1 processing, QAM/QPSK demodulation, also string conversion, RS decoding, forms TS stream.

3. channel-decoded part

This part finishes mainly that the adjustment of data of carrying out MPE (multi-protocols encapsulation) decapsulation, MPE FEC (multi-protocol packaging forward error correction), Time Slicing (time slicing) are contrary to be handled etc., be demodulated to the IP packet, and further processing such as demultiplexing, be demodulated into H.264 or the audio signal of the vision signal of WMV form and MP3 format (the audio-video signal form also can be an extended formatting, is determined by operator.)

4. audio/video decoding part

This part is mainly finished audio/video decoding, and video decode is pressed WMV (or extended formatting) decompression algorithm and formed RGB primary colours digital signal, and audio decoder is pressed WMA (or extended formatting) decompression algorithm and formed digital music signal.

5. audio frequency and video output

The image that image aspect, this part are mainly finished on displays such as TFT LCD or OLED shows and relevant driving.

Sound aspect, this part are mainly finished audio signal D/A conversion, power amplification and are promoted loud speaker or earphone output.

6. accumulator system

Memory comprises hard disk, FLASH card, program storage, data storage and the desired NVRAM of CA system on the terminal equipment, interface data buffer storage etc.

As another embodiment, Fig. 2 has described multimedia mobile terminal hardware and has constituted, and now is described in detail as follows with regard to each module:

1, special-purpose SOC (System On Chip) chip, OMAP series as TI company, it is special multifunction chip for hand-held product design, it is powerful as ARM or MIPS etc. that it is integrated, support software operating system such as Linux etc., the also integrated powerful DSP that has, but also support numerous peripheral interfaces such as storage mediums such as USB, USB OTG, USB HOST, TFTLCD and SD/MMC/CF card, hard disk.The various interface of further part, existing SOC can support the seamless link between them, does not repeat them here.

2, button part is used for complete machine is operated.

3, indicator light part, being used to refer to complete machine has off status such as power supply, hard disk working condition etc.

4, USB CLIENT part is used for allowing equipment such as multimedia mobile terminal and computer carry out data at a high speed and transmits, and copies to as the movie file that will have hard disk on the big capacity hard disk of multimedia mobile terminal.

5, USB HOST part is used for the file of equipment such as USB flash disk, digital camera is carried out operations such as access, and does not need by the computer conversion convenient the use.

6, USB OTG part is used for carrying out file operation with the equipment that possesses corresponding function, as possesses the printer of this function, can directly print the file in the multimedia mobile terminal, and not need to pass through computer.

7, WIFI part is used for allowing multimedia mobile terminal and other equipment carry out wireless transmission, as passing through WIFI, realizes wireless telecommunications with the computer that possesses the WIFI function, mobile phone etc.

8, network interface card part, multimedia mobile terminal partly realize visiting the purpose of Internet by network interface card.After possessing this function, can realize that news is read in online, function such as play games, send and receive e-mail.

9, FLASH part is used for store software code.

10, SDRAM part, it is temporary to be used to provide program, data.

11, data/address bus provides the interface of SOC chip and peripheral devices such as SDRAM, FLASH, hard disk, CF card etc., so that information exchange is carried out in the phase mutual energy.

12, hard disk/storage medium interface parts such as CF/SD/MMC card.The hard disk of multimedia mobile terminal/CF card etc. partly is the memory bank of files such as store movies, music, picture, the TV programme that he can receive antenna is deposited with the form of file, play in needs, it also allows the built-in hard disk/micro harddisk of cards such as CF, SD, MMC and multimedia mobile terminal carry out exchange files again.

13, antenna part is used for receiving terrestrial broadcasting Digital Television radiofrequency signal

14, tuner pack is finished high frequency amplification, automatic gain control, down-conversion, intermediate frequency amplification of terrestrial broadcasting Digital Television radiofrequency signal etc.

15, a series of processing such as IFFT-1 processing, QAM/QPSK demodulation, also string conversion, RS decoding are mainly finished in OFDM (OFDM modulation) demodulation part, this part, form TS stream

16, channel-decoded part

This part is mainly finished and TS stream is carried out the adjustment of data, Time Slicing (time slicing) of MPE (multi-protocols encapsulation) decapsulation, MPE FEC (multi-protocol packaging forward error correction) is contrary to be handled etc., be demodulated to the IP packet, and further processing such as demultiplexing, be demodulated into H.264 or the audio signal of the vision signal of WMV form and MP3 format (the audio-video signal form also can be an extended formatting, is determined by operator.)

17, audio coding decoding (CODEC) and power amplifying part.

When recording operation, will be from the simulated audio signal of microphone or circuit input, be transformed to digital audio and video signals through A/D, and this signal delivered in the special-purpose SOC chip, (as MP3, AAC etc.) carry out audio compression with certain form, then can be with audio files storage in storage mediums such as hard disk.

When music, from the digital audio and video signals process D/A conversion that the SOC special chip comes, form the audio signal of simulation, can be used as circuit output on the one hand, can pass through power amplification rear drive earphone or internal loudspeaker on the other hand.

18, outside analogue audio frequency input is mainly finished in audio frequency importation, as voice band line input, microphone input.

19, earphone and speaker portion are mainly finished the output of sound, are the media that sound sends.

20, video signal input section mainly is the outside analog video signal of output, comprises CVBS or S-VHS analog signal.

21, video coding part mainly with the analog video signal process A/D conversion of input, forms the digital signal that meets special-purpose SOC acceptance, and delivers to and carry out packed record in the SOC chip.

22, demonstration and drive part mainly comprise display device and corresponding necessary drive parts such as TFT LCD or OLED.When carrying out video playback, from the LCD/OLED output port output digital video signal of SOC chip, deliver to driver unit, through the exciting circuit of LCD/OLED, form LCD/OLED acceptable signal form, image is presented on the LCD/OLED screen.Certainly, display screen such as LCD/OLED all must have backlight circuit.

23, video output mainly with the analog video signal output that forms in the SOC chip, allows common television set can appreciate the built-in film in multimedia terminal, picture.

24, power management part, the main effect of this part is for complete machine provides power supply, he is converted to the needed power supply of each several part in the system with the DC power supply or the battery supply process DC-DC conversion of outside input.Because be portable product, strict especially to power consumption, when a certain partial circuit was not worked, it bore power management work with the SOC chip, cut off the power supply of appropriate section.

25, battery charge and protection part.Be used for the rechargeable battery such as the lithium battery of product are charged, and lithium battery must carry out reliable overshoot, overvoltage protection in charging process; In the lithium battery discharge process, must carry out under-voltage, overheated, overcurrent, over-discharge can protection, reach the purpose of safe handling.

The physical circuit of above-mentioned each unit belongs to prior art, for a person skilled in the art, can have no the realization of difficulty, and be not inventive point of the present utility model place, and therefore detail circuits figure no longer is provided.

Claims

1, multimedia mobile terminal comprises:

Tuning part is used to finish low/high frequency amplification, automatic gain control, down-conversion, forms intermediate-freuqncy signal and amplification;

The OFDM demodulation is finished in the OFDM demodulation part, comprises a series of processing such as IFFT-1 processing, QAM/QPSK demodulation, also string conversion, RS decoding, forms TS stream;

The channel-decoded part is used for the agreement deblocking and the adjustment of data;

The audio/video decoding part, according to decompression algorithm to audio/video decoding;

The audio frequency and video output;

Power unit;

2, multimedia mobile terminal as claimed in claim 1 is characterized in that, also comprises storage area, and described storage area is connected with the passage demodulation part.

3, multimedia mobile terminal as claimed in claim 1 is characterized in that, also comprises the network service part, and described network service partly provides the data communication network interface.

4, multimedia mobile terminal as claimed in claim 1 is characterized in that, also comprises the man-machine interaction part, is made of control panel and display circuit.