CN201194408Y - A portable digital multimedia terminal - Google Patents

Abstract

The utility model is applicable to the field of multimedia technology and provides a portable digital multimedia terminal. The terminal includes a storage module, and the terminal further includes: decoding and processing the multimedia data information in the storage module to generate audio and video signals a main controller; an audio module that outputs the audio signal codec generated by the main controller; and a TV signal output module that converts the video signal generated by the main controller into a CVBS signal and outputs it. The portable digital multimedia terminal provided by the utility model has a built-in TV signal output module, which can output internally stored pictures, audio and video information, etc. to an analog TV with a large-size screen for playback, so that users can get more sufficient entertainment experience, and also It broadens the program resources of TV sets, and changes the semi-closed state of analog TV sets to a certain extent at the time when digital TVs are becoming more and more popular.

Description

A portable digital multimedia terminal

technical field

The utility model belongs to the field of multimedia technology, in particular to a portable digital multimedia terminal.

Background technique

With the maturity of the multimedia electronic product market, people's entertainment needs have risen from purely satisfying listening enjoyment to dual enjoyment combined with audition, and various portable digital multimedia terminals emerge in endlessly, such as digital multimedia terminals that store pictures, audio and video files and then play them. Portable multimedia terminals are gradually becoming a very important entertainment carrier in people's lives, especially digital multimedia terminals that receive and play program information on a mobile basis. The digital multimedia terminal has a good application prospect. It is supported by digital technology. It receives and plays TV programs by receiving wireless digital signals on the ground. Stable and clear, so that viewers can easily watch TV programs in the mobile state, but the above-mentioned portable multimedia playback terminals are limited by factors such as screen size, and cannot allow users to obtain sufficient entertainment enjoyment.

Utility model content

The purpose of the utility model is to provide a portable digital multimedia terminal, aiming to solve the problem that the existing portable multimedia playback terminal cannot provide users with sufficient entertainment enjoyment due to factors such as screen size.

The utility model is realized in this way, a portable digital multimedia terminal includes a storage module, and the portable digital multimedia terminal also includes:

A master controller that decodes the multimedia data information in the storage module to generate audio and video signals;

an audio module that outputs after encoding and decoding the audio signal generated by the main controller; and

A TV signal output module that converts the video signal generated by the main controller into a CVBS signal and outputs it.

The portable digital multimedia terminal provided by the utility model has a built-in TV signal output module, which can output pictures, audio and video information, etc. stored inside to a TV set with a large-size screen for playback, so that users can get a more sufficient entertainment experience and broaden the horizons. The program resources of the TV have been reduced, and the semi-closed state of the analog TV has been changed to a certain extent at the current time when the digital TV is becoming more and more popular.

Description of drawings

Fig. 1 is the structural principle diagram of the portable digital multimedia terminal provided by the utility model;

Fig. 2 is the schematic diagram of the portable digital multimedia terminal provided by the utility model receiving the wireless digital TV signal;

Fig. 3 is the principle diagram that the multimedia data information of the portable digital multimedia terminal provided by the utility model is played through the TV set;

Fig. 4 is a schematic diagram of the physical connection between the portable digital multimedia terminal and the TV set provided by the utility model;

Fig. 5 is a structural principle diagram of the power supply module of the portable digital multimedia terminal provided by the utility model.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

In the utility model, through a built-in TV signal output module in the portable digital multimedia terminal, data information such as pictures, audio and video, or real-time received TV broadcast programs stored in the portable digital multimedia terminal is encoded and processed, and then output to the TV for users watch.

Fig. 1 shows the structural principle of the portable digital multimedia terminal provided by the present invention, and for the convenience of description, only the parts related to the present invention are shown.

1, the portable digital multimedia terminal includes a main controller 11 and a display module 12 connected with the main controller 11, an audio module 13, a storage module 14, a user input interface 15, a universal serial bus (UniversalSerialBus, USB) interface 16 , a power supply module 17, a TV signal output module 18 and a wireless digital TV signal receiving module 19, the wireless digital TV signal receiving module 19 is used in areas where the Terrestrial Digital Multimedia TV/HandleBroadcasting (DMB-TH) is opened To receive the digital TV signal, the power supply module 17 is connected with the above-mentioned modules at the same time, and is used to provide the working voltage required by each module. The main controller 11 includes a circuit with a dual-processor structure to support hardware video acceleration and has good audio and video decoding capabilities. For example, the integrated circuit model TELECHIPS 7801 can be used, and the main frequency can reach 192MHZ at the highest. Storage module 14 comprises synchronous dynamic random access memory (Synchronous Dynamic Random AccessMemory, SDRAM), flashing memory (flash) and the compressed flash memory (Compact Flash, CF) card or safe digital card (Secure Digital memory card, SD) interface used for expansion, thereby Realize the storage of large-capacity multimedia information data. The user input interface 15 can be buttons, a touch screen, and the like. The portable digital multimedia terminal provided by the utility model can be connected with equipment such as a computer through the USB interface 16 to perform data interaction of information such as audio, video, and pictures.

The portable digital multimedia terminal provided by the utility model can play information such as audio and video files and pictures stored in the storage module 14 through the display module 12 and the audio module 13, and can also process the digital TV program information received by the wireless digital TV signal receiving module 19 After playing, Fig. 2 shows the principle that the portable digital multimedia terminal provided by the utility model receives the wireless digital TV signal, and also only shows the part related to the utility model. Wireless digital television signal receiving module 19 comprises antenna 191, tuner 192, A/D converter 193 and demodulator 194, wherein the input end and output end of tuner 192 are connected with the input of antenna 191 and A/D converter 193 respectively The output end of the A/D converter 193 is connected to the input end of the demodulator 194, and the output end of the demodulator 194 is connected to the main controller 11, and the carrier signal loaded with the digital TV signal received by the antenna 191 passes through After tuner 192 frequency conversion processing, A/D converter 193 carries out analog-to-digital (Analog-Digital, A-D) conversion successively, and demodulator 194 becomes MPEG-TS data flow after being demodulated, and then passes main controller 11 After the internal hardware audio and video decoding unit processes separately, the obtained video signal is output to the display module 12, and the audio signal is output by the headphone interface after being coded and decoded by the stereo codec 131 in the audio module 13, or sequentially passed through the stereo codec device 131, audio amplifier 132 and then output to the speaker.

The portable digital multimedia terminal provided by the utility model can output the multimedia data information such as audio and video files and pictures stored inside it, and the digital TV program information received by it to the TV for multimedia playback. Appreciating multimedia programs can provide more sufficient entertainment experience, and also broaden the program resources of the TV set. Figure 3 shows the principle of playing multimedia data information of the portable digital multimedia terminal provided by the utility model through the TV set. After the TV output function of the terminal is activated, the multimedia data information in the storage module 14 or the digital TV program information received by the wireless digital TV signal receiving module 19 will be decoded and processed by the main controller 11 to generate RGB video signals, and output to the TV signal The television signal encoding circuit 181 in the output module 18, wherein the television signal encoding circuit 181 can adopt the model to be the integrated circuit realization of ADV7393, the television signal encoding circuit 181 converts the RGB video signal into a composite television broadcast signal (composite videobroadcast signal, CVBS), And the converted CVBS composite video signal is output to the TV set by the video port of the TV signal output module 18, and the multimedia terminal outputs the audio signal to the TV set through the earphone interface of the audio module 13 simultaneously, and Fig. 4 is a portable TV provided by the utility model A schematic diagram of the physical connection between the digital multimedia terminal and the TV set, wherein the TV set is connected to the video port 42 and the headphone jack 43 of the portable digital multimedia terminal through an audio-video connection line 41, and the touch screen 44 of the portable digital multimedia terminal adopts a capacitive touch screen. Inductive current is triggered when the human body touches, after starting the machine by button 45, the system is initialized, and the main interface is loaded and generated on the liquid crystal display screen, and the user can choose to open or switch to the corresponding function menu through the touch screen 44, such as digital TV, TV output, multimedia Play, game entertainment, system settings and other functions. When the terminal is connected to a personal computer through its USB interface, data exchange can be performed to obtain more Internet resources, and system software can also be upgraded at the same time.

Fig. 5 has shown the structural principle of power supply module 17 in the utility model, comprises power management circuit 171, rechargeable battery 172, charge management circuit 173, power supply adapter interface 174 and a plurality of DC-DC (Direct Current-Direct Current, DC -DC) voltage converter, wherein the power management circuit 171 is connected to the main controller 11, and the DC-DC voltage converter is used to convert the power supply of the rechargeable battery 172 or the external power supply into the work required by each module in the terminal Voltage. When the power management circuit 171 detects that the external power supply supplies power to the system through the power adapter interface 174 or the USB interface 16, it will automatically switch from the rechargeable battery 172 to the external power supply, and at the same time control the charging management circuit 173 to charge the rechargeable battery 172, When there is no external power supply, the system can be directly powered by the rechargeable battery 172, thus having better portability.

To sum up, the portable digital multimedia terminal provided by the utility model has a built-in TV signal output module, which can output the pictures, audio and video information stored inside, and the digital TV program information received by the portable digital multimedia terminal to a large-sized screen. Playing on the TV allows users to have a more complete entertainment experience, and also broadens the program resources of the TV. With the increasing popularity of digital TV, it has changed the semi-closed state of the analog TV to a certain extent; and the dual processing in the main controller The adoption of the audio and video decoding circuit of the device structure is also conducive to supporting hardware video acceleration and improving the system's audio and video decoding capabilities.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (6)

1. A portable digital multimedia terminal, comprising a storage module, is characterized in that, said portable digital multimedia terminal also includes: A master controller that decodes the multimedia data information in the storage module to generate audio and video signals; an audio module that outputs after encoding and decoding the audio signal generated by the main controller; and A TV signal output module that converts the video signal generated by the main controller into a CVBS signal and outputs it. 2. Portable digital multimedia terminal as claimed in claim 1, is characterized in that, described portable digital multimedia terminal also comprises a wireless digital television signal receiving module that is connected with described master controller, and described wireless digital television signal receiving module further: antenna; A tuner that performs frequency conversion processing on the carrier signal loaded with the digital TV signal received by the antenna and outputs it; an A/D converter for analog-to-digital conversion of the signal output by the tuner; and The demodulated result converted by the A/D converter is output to the demodulator of the main controller. 3. The portable digital multimedia terminal according to claim 1, wherein the main controller includes a circuit for audio and video decoding processing of multimedia data information, and the circuit has a dual-processor structure. 4. Portable digital multimedia terminal as claimed in claim 1, is characterized in that, described audio module comprises: a stereo codec for encoding and decoding the audio signal generated by the master controller; and An earphone interface for outputting the audio signal processed by the stereo codec. 5. Portable digital multimedia terminal as claimed in claim 4, is characterized in that, described TV signal output module comprises: A TV signal coding circuit that converts the video signal generated by the main controller into a CVBS signal; and A video port for outputting the encoding result of the television signal encoding circuit. 6. Portable digital multimedia terminal as claimed in claim 5, is characterized in that, described portable digital multimedia terminal further comprises: An audio and video cable connecting the earphone jack and the video port to the TV.

Images