CN1753469A - Multimedia terminal - Google Patents

Abstract

This invention relates to a process technology of multimedia image signals, which provides a combined system for computers and TV including a multimedia terminal including a TV set, which is set with a multimedia process unit including a processor, a storage device and a multimedia interface, said processor is connected with the storage device and the multimedia interface. Advantage: multi-kind of storage media can be connected externally and storage pictures, music and films can be previewed, played, managed and registered on TV with remote controllers.

Description

The multimedia terminal

Technical field

The present invention relates to signal processing technology, particularly the multi-media image signal processing technology.

Background technology

Along with the continuous maturation of market environment, but begin to occur more and more MP4, mobile phone, PDA, PMP (hand held multimedia player) or the like player of playing video on the consumer electronics market, also be subjected to the welcome of certain customers simultaneously.But this kind equipment is owing to be subjected to the restriction of volume, memory capacity, and comparatively speaking, storage cost is too high, screen size is little, play poor definition, exists toward contact and can not record a video, defective such as can not manage to document information source.

In the technology spring tide that 3C merges, be that the center still is that the topic at center was once debated endlessly with the colour TV with the computer.But just at present, easier mode of operation, the wider popularity that is ordinary consumer is accepted becomes only consumption electronic product to TV with it.

Summary of the invention

Technical problem to be solved by this invention, be exactly too high at existing multimedia player storage cost, screen size is little, play poor definition, can not record a video, and to the defective that document can not be managed, provides the combined system of a kind of computer and TV.

The present invention solves its technical problem, and the technical scheme of employing is that the multimedia terminal comprises television set; It is characterized in that: described television internal multimedia processing unit; Described multimedia processing unit comprises processor, storage device and multimedia interface; Described processor is connected with storage device and multimedia interface.

The invention has the beneficial effects as follows, can external multiple storage medium, read and play JPEG, MP3, MPEG4 or the like digital multimedia document, just can be with normal remote control by TV with the photo in the being stored in television set, music and film carry out preview on TV, play, management and record, even digital camera, the photo that mobile phone is taken, also can be transferred on the TV and show, back printer simultaneously, get exquisite image, media product and tv product are merged, realize interconnecting of information resources, expanded the fusion application of information, work that is convenient for people to and life.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the block diagram of embodiment.

Embodiment

Describe technical scheme of the present invention in detail below in conjunction with drawings and Examples.

The present invention adapts to the hardware structure of existing television set technically, broken through the thoughtcast of original PMP, make full use of the Display Technique of current high definition digital television machine, adopt the LCD screen of multiple size to carry out the terminal demonstration of image, system for TV set and computer system are optimized combination, can realize real-time decoding, realize function such as coding, storage, playback simultaneously the audio/video signal to files in stream media such as JPEG, MP3, MPEG1/2/4, DIVX3.0/4.0/5.0, ASF4.Its structure as shown in Figure 1.Among the figure, processor carries out decoding processing by multimedia interface to the multimedia audio-video signal of importing, be sent to television set and play, perhaps import storage device stores, the TV signal that television set receives also can store by sending into storage device behind the processor compressed encoding.

Technical scheme of the present invention is that the multimedia terminal comprises television set; It is characterized in that: described television internal multimedia processing unit; Described multimedia processing unit comprises processor, storage device and multimedia interface; Described processor is connected with storage device and multimedia interface;

Described storage device is a hard disk;

Described multimedia interface comprises ide interface, USB interface and digital card;

Described processor is that core constitutes with PXA270;

The built-in WINDOWS CE of described multimedia processing unit operating system;

Described television set is the high definition digital television machine.

Embodiment

Present embodiment adopts and implements at the built-in multimedia processing unit of panel TV set.As shown in Figure 2.The multimedia terminal mainly comprises television set and multimedia processing unit two parts, and television set is finished processing, demonstration and the controlled function of TV signal; Built-in multimedia processing unit is then finished multimedia signal dispose.This routine multimedia processor adopts the XScale platform that Intel Company proposed, and is center processing unit with PXA270.

The PXA270 processor is based on the solution of ARMv5TE architecture, adopts the XSCAL multimedia treatment technology of INTEL, has 7 state pipelines, the Instructions Cache of 32KB, the metadata cache of 32KB, " mini " metadata cache of 2KB has the data buffering that can expand to 64MB; Simultaneously, built-in Memory Controller Hub, inside and outside highway width are respectively 16 and 32bit, and support the SDRAM of 2.5V, and that use in this example is 64MBSDRAM.PXA270 itself promptly has the collocation of flash memory, during the low-power consumption, and the internal SRAM that high spped coding and storage are had the 256K byte.Have Base-Band Processing interface at a high speed, abundant serial ports configuration comprises the I2S audio port, USB principal and subordinate control and MiniUSB (USB2.0), USB OTG control, three tunnel high speed serial ports, simulation hardware mouth, and a large amount of GPIO mouths and PWM mouth.Support the IDE data format, support real-time clock, the high-performance memory of the highest 104MHZ that plugs into, cpu clock are 104～424MHZ.Supporting digital card such as MS, SD, MMC and pcmcia card interface, is the processor of a full performance, high performance-price ratio, low-power consumption.It supports 16 Thumb instruction and DSP instruction set, has used in occasions such as digital mobile phone, personal digital assistant and networking products.This programme adopts the version of 400MHz sequential, and via 0.18 micron system production, system bus clock can reach 200MHz, allows integral operation usefulness be strengthened.

Among Fig. 2, the analog audio-video signal that multimedia processor PXA270 exports after with the television set demodulation carries out the high-speed AD conversion, signal format with 8 ITU656 is carried out the compression of MPEG4 by software, under the system management of CPLD, with signal storage on built-in micro hard disk.Under the control of television set, multimedia processor decompresses specified file by the file management system of inside simultaneously, and digital R, G, the B signal that obtains after the decoding carried out format conversion, at last high-definition signal is outputed to panel TV and shows; Perhaps, output to panel TV and carry out preview, management, broadcast decoded digital signal D/A conversion; The data file of external equipment imports hard disk by devices such as USB interface or digital cards, or directly as connecting from device, by programmable CPLD device management planning, digital R, G, the B signal that obtains after multimedia file decompressed carries out outputing to panel TV after the format conversion and shows under the control of television set.

The operating system of WINDOWS CE has been transplanted in multimedia processor inside, can carry out unified management and operation to file, system, window, the BIOS system of management data input and output, it by the user use a teleswitch and screen on miniature keyboard come system is operated.Operating system after the PXA270 internal operation is transplanted, the management hard disk drive, compare with common operating system, need not drive video card, only export 18 or 16 s' digital R, G, B signal, adopt the high-speed d/a conversion, will simulate R, G, the B signal is input to television set and shows, the high definition of demonstration can reach 1024 * 768.

Multimedia processor is plug-in USB principal and subordinate interface simultaneously, supports the USB2.0 principal and subordinate interface, and digital card such as SD, MS, MMC can be carried out high speed communication with external computer, carries out the file managements such as copy, deletion of file; Can support JPEG, MP3, MPEG1/2/4, DIVX3.0/4.0/5.0, ASF or the like file format; Support the exchanges data of IDE form, support 1.8 ", 2.5 ", 3.5 " hard-disk interface;

Below from three improvements combined system of the present invention is described respectively:

1) image of high-definition format shows:

The highest exportable image resolution ratio of the scheme of PMP is QVGA352 * 288; The products scheme of PVR support MPEG1/2/4 compression, decompressing is up to FULL D1, but the resolution when playing static document is lower than the form of CIF;

This programme has been broken through the displaying scheme of PMP, PVR, DVD product in the past, the high-res of playing tableaux can reach 2048 * 2048, the highest playback rate of motion picture is 30fps@720 * 576, and video data normal play flow 3Mb can reach 10Mb.The present invention program adopts software platform to carry out the high-speed data computing, convenient realization format conversion and broadcast show, all adopt software scenario to decompress to analog audio-video image and still image, adopt inner multiple concurrent multimedia processing mode, use brand-new 2D﹠amp; The 3D figure quickens handling implement, again by matrixing, the yuv data behind the decompress(ion) is reverted to R: G: B 5: 6: 5; 6: 6: 6; 8: 8: 8 three kinds of optional data patterns for reducing the loss of image, are not carried out format conversion, directly output to television module by the YPbPr passage and show; Tupe in the past all is after signal is synthesized the VIDEO signal earlier, carries out outputing to the television set demonstration by the YCbCr passage after the A/D conversion again, greatly reduces the resolution of image;

The WINDOWS CE operating system that this programme is transplanted in multimedia processor, by creating user interface, allow the user when system operation, to finish to window, in the hard drive management, can also handle the IDE signal by the api function bag, export the R of 5: 6: 5 or 6: 6: 6: G: the B signal directly arrives television set, or change through D/A, the high speed convergent-divergent, output resolution ratio is up to 1024 * 768, make the user can on various LCDs, show Word, EXCEL document, rather than be converted to audio-video signal by data acquisition and handle.

2) the WINDOWS operating system of support high-speed cruising;

The present invention is implemented in by multimedia processor WINDOWS operating system is installed on the television set, can move Word, the Excel system of pocket edition, shows relevant document.

The present invention has transplanted Windows CE operating system in multimedia processor; This system is one 32, the operating system of multitask, multithreading, and its open project organization is applicable to various equipment.Windows CE is a kind of compression and upgradeable software systems.Even under little internal memory condition, it also can provide higher performance.

After Windows CE is transplanted to dsp system, also need to write boot, design user interface, the design of user interface and desktop is the design key of embedded system.The present invention adopts the OEM adaptation layer of independently writing, and has defined the personalized interface of application program.When writing user interface, adopted the mode that Windows CE is backward compatible, cancelled management and control to display device, disk, for quickening the transmission rate of IDE data, view data is changed graphics mode by the API bag; Reduce as far as possible the multiple of process called, made the miniature panel that is presented on the screen, simplified the design of desktop, realized refreshing in real time of background.

The Windows CE of technical scheme support of the present invention comprises four modules, and these four modules provide most important operation system function: kernel, object storage, windowing, incident subsystem (GWES).Core blocks is responsible for memory management, management of process and some essential file management facilities, and managing virtual internal memory, scheduling, multitask, multi-process and expection are handled; The object storage piece is supported Windows CE object storage API function, support to comprise file types such as application program and data file, but the configuration of application storing fast access system and any out of Memory provides the structured storage database.GWES is the graphical user interface between user, user application and the operating system.It selects to be converted to message with the button operation and the control of miniature panel, and transmission information comes the process user input for application program and operating system.Simultaneously by creating and management window displayed, figure and text-processing output on peripheral hardware and printer.The core of GWES is a window.All application programs need window so that receive information from operating system.

3) adopt high speed data bus management system and jumbo hard disk storage devices

The audio/video coding that the present invention adopts multimedia processor to finish TV signal compresses, stores.The highest FULL D1. that supports of image quality level, multimedia processor support Variable Length Code, encode in the position continuously, support conversion between the MPEG2PS-TS stream; Adopt the management of CPLD high speed logic control IC, signal flow between planning memory and IDE bus, the compression control that can adapt to various low level audio/video signals, the audio-video signal of synchronous multiple the form, (format conversion of accelerating video Signal Processing speed, sampling conversion in 4: 2: 0 → 4: 2: 2, gamma proofreaies and correct or the like), the read/write logic of control hard disk drive adopts the multiple spot real time sample, realize data compression fast, can finish vision signal NTSC/PAL format conversion;

When starting WINDOWS CE operating system, adopt PIO and DMA pattern to carry out the exchanges data of hard disk, data management system, promptly carry out the I/O port command and carry out reading and writing data, exchange by CPU, or without CPU and directly from the memory access data.

The present invention supports the USB2.0 interface protocol, and the normal transmission rate can reach per second 12Mbps, and high transmission rates is 480Mbps, can 24 terminal uses of the highest support.Built-in USB OTG chip functions can directly export file to printer.Can image directly can be delivered to printer prints by inter-transmitting files such as USB interface and MP3 walkman, camera mobile phones.

The micro hard disk stores compressed data of the built-in 40G of telecomputer of the present invention is carried out document storing, adopts IDE data format and multimedia processing module to carry out data communication.

Claims (6)

1. the multimedia terminal comprises television set; It is characterized in that: described television internal multimedia processing unit; Described multimedia processing unit comprises processor, storage device and multimedia interface; Described processor is connected with storage device and multimedia interface.

2. multimedia terminal according to claim 1 is characterized in that: described storage device is a hard disk.

3. multimedia terminal according to claim 1 is characterized in that: described multimedia interface comprises ide interface, USB interface and digital card.

4. multimedia terminal according to claim 1 is characterized in that: described processor is that core constitutes with PXA270.

5. according to claim 1,2,3 or 4 described multimedia terminals, it is characterized in that: the built-in WINDOWS CE of described multimedia processing unit operating system.

6. multimedia terminal according to claim 1 is characterized in that: described television set is the high definition digital television machine.

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