CN2819675Y - Portable device with both digital TV and digital audio and video playback functions - Google Patents

Abstract

A portable device capable of playing digital TV and digital video and audio contents (including dynamic and static images and music) stored in memory card mainly uses Digital Media Processor (DMP) as control and image processing center; the digital media processor is respectively connected with a digital television channel selector, a memory card reader, a volatile memory, a nonvolatile memory, an audio digital-to-analog converter and a liquid crystal display; the digital media processor can control the digital television channel selector to select channels and decompress the MPEG-2 signals of the digital television programs sent by the digital media processor; the card reader can be controlled to read the digital video and audio content stored in the memory card inserted in the card reader, the two image sources are switched by the user to select one of the two image sources to be watched, and the digital media processor processes the selected image source and sends the processed image source to the liquid crystal display to be displayed.

Description

Portable device with both digital TV and digital audio and video playback functions

technical field

The utility model relates to a portable playback device, in particular to a playback device compatible with digital TV and digital audio and video stored in a memory card.

Background technique

Because digital cameras have the advantages of immediately checking the photos taken and being erasable, and the pixels of existing digital cameras are at least more than three million, and the resolution has also surpassed traditional negative cameras. Therefore, in recent years, Almost completely replace film cameras. Although digital cameras are equipped with liquid crystal displays for viewing, their size is limited by the camera body and power consumption, making it difficult to make a size that is very suitable for naked eyes. The image quality (including brightness, contrast, and resolution, etc.) It is not very ideal; and viewing photos on the camera will also consume the power of the camera itself, thereby reducing the number of sheets that the camera can continue to take pictures. It is still not an ideal way to view photos. Therefore, some users will use another digital photo album to store and view digital photos exclusively, so as not to reduce the battery life of the digital camera, and the digital photo album will usually be equipped with a larger size and better image quality LCD Display, more suitable for viewing digital photos. And many digital cameras also provide the recording function of dynamic video and audio in addition to the basic digital photo shooting function, so the memory card of the digital camera may include digital information such as digital photos and dynamic audio and video content.

On the other hand, the digitization of wireless TV has also become an inevitable trend, and Digital TV has already confirmed that it will or has replaced traditional analog TV (Analog TV). Compared with analog TV, digital TV not only has the advantages of high picture quality, high sound quality and high bandwidth utilization rate, but also the signal acquisition effect is far beyond the reach of analog TV. Digital TV has excellent signal acquisition capabilities on the ground. Ability to obtain a good signal even on vehicles traveling at high speeds. In the past, although there were vehicle-mounted and portable analog TV products, but because the radio signal of analog TV is easily blocked by terrain and buildings and other radio waves, the received signal is already extremely unstable when the ground is stationary. It is very easy to cause screen jumps, snowflakes, and black-and-white screens. Especially, it cannot meet the needs of receiving letters when the car is traveling at high speed. The practicability is not high, so that the vehicle-mounted and portable analog TV products are always just a foil in the market. Role. However, with the advent of digital TV and the rapid advancement of color liquid crystal display technology, this situation is about to be completely changed, and vehicle-mounted and portable digital TVs have sprung up on the market one after another.

Viewing of digital photos and viewing of digital TV have become extremely important electronic devices for consumers, and both of them must use liquid crystal displays to display images, but there is no device with both functions on the market. , if the two functions can be combined in one, the added value of the product will be increased, and it will be more competitive than products with a single function, and this market demand must exist and should be met.

Utility model content

The main purpose of the utility model is to provide a portable device with functions of digital TV and digital audio-visual playing, which has a miniaturized body, and has the functions of receiving digital TV and reading digital audio-visual content stored in the memory card ( Such as digital photos and dynamic audio-visual) functions, users can carry them with them, and can choose to watch digital TV or view digital audio-visual content in the same body, so as to maximize the effectiveness of portable image display devices.

In order to achieve the above object, the portable device with digital TV and digital audio-visual playing function of the present utility model is that a liquid crystal display and necessary batteries are arranged on a small casing; a digital media processor (DMP) is used as a Control and image processing center, which are respectively connected with digital TV channel selector, memory card reader, volatile memory, non-volatile memory, audio digital to analog converter and liquid crystal display; the digital media processor can control The digital TV channel selector selects the channel and decompresses the MPEG-2 signal sent into the digital TV program; it can also control the card reader to read the digital data stored in the memory card inserted into it. Audio-visual content, the digital audio-visual content can be static digital photos or dynamic digital audio-visual, these two image sources are switched by the user to choose one to watch; the digital media processor processes the selected image source and sends it to the LCD display to display.

Description of drawings

Fig. 1 is the circuit block diagram of the utility model embodiment;

Fig. 2 is a control flow chart of the utility model embodiment.

In the accompanying drawings, the list of parts represented by each label is as follows:

1- Digital Media Processor

2- Digital TV channel selector

3- Card reader

41 - first memory

42-second memory

5-User Interface

6- LCD display

7- Audio Digital to Analog Converter

8- Audio Amplifier

S1～S8-steps

Detailed ways

Fig. 1 is the circuit block diagram of the preferred embodiment of the present utility model. As shown in Figure 1, the utility model uses a digital media processor (Digital Media Processor, DMP) 1 as the control center of the overall circuit operation, and the image processing center. The processor 1 has a programmable function, can perform actions according to a preset program, and has at least MPEG-2 and JPEG decompression capabilities. Of course, any person skilled in the art will know that if the processor 1 has other more decompression, decoding and image processing capabilities, it will certainly be able to add more types of image data, such as TIFF (TIF), RAW, MPEG -1, MPEG-3 (MP3) and MPEG-4 formats. A commercially available processor number ES6425 sold by ESS Technology is a better available product.

The periphery of the processor 1 is electrically connected with a digital TV channel selector 2, a memory card reader 3, a first memory 41, a second memory 42, a user interface 5, a liquid crystal display 6, and an audio digital to analog converter (Audio DAC) ) 7 and audio amplifier 8. Wherein, the user interface 5 is a button arranged on the casing, preferably a wireless or wired remote controller for the user to input control commands, such as power switch, volume and TV channel selection, can be further provided. The first memory 41 is a non-volatile memory, preferably an electronically erasable programmable read-only memory (EEPROM) or a flash memory (flash memory), which is used to store the control program required by the processor 1 to execute the overall operation. The second memory 42 is a volatile memory, preferably a Synchronous Dynamic Random Access Memory (SDRAM), used for the processor 1 to access temporary data.

Digital TV channel selector 2 is connected with antenna 21, can receive the radio wave of digital TV, when user sets to watch digital TV through user interface 5, channel selector 2 promptly is started by the control of processor 1, and will use The selected channel program is received and demodulated (demodulation), and sent to processor 1 in the original compression format of MPEG-2, decompressed by processor 1 and restored to video and audio signals, and then sent to the liquid crystal display 6 and audio digital to analog converter 7, the image and sound of the selected channel program can be presented. Of course, those skilled in the art will also be able to understand that the liquid crystal display 6 referred to here only represents that it is currently the most suitable for the small-size thin color display of the present utility model, and does not exclude the use of other types of displays. Other available displays are developed, and the utility model should also be adopted. In the audio part, the audio digital to analog converter 7 converts the digital format audio signal of the digital TV sent by the processor 1 into an analog format, and then sends it to the audio amplifier 8 for power amplification, and the audio amplifier 8 amplifies the power again. The audio signal is sent to the speaker 81 to emit sound or connected to the earphone 82 via the earphone jack.

Memory card card reader 3 is used to insert one or more types of memory cards, such as CompactFlash (CF), Micro Drive, Secure Digital (SD), Multi Media Card (MMC), Memory Stick (MS), Smart Media (SM) and xD etc. When the user chooses to view digital audio-visual content and a memory card is plugged into the card reader 3, the processor 1 controls the card reader 3 to read the digital audio-visual content stored in the memory card. Currently, digital cameras are most commonly used. The format of the digital photo is the JPEG (JPG) format, and there are also a small number of high-end digital cameras for users to store digital photos in the TIFF (TIF) and RAW formats, so the processor 1 of the preferred embodiment of the present utility model has at least the ability to process JPEG (JPG) format digital photo capabilities. After the processor 1 decompresses and/or image-processes the read-in digital photo, it sends the video image signal to the liquid crystal display 6 for display. In addition, some digital cameras also provide a dynamic recording function, which can store dynamic images and sounds in the memory card in MPEG-1/2/4 format, or some digital music players (such as MP3 players) also provide memory The card stores the function of MP3 digital music data, also can provide the processing of this kind of dynamic audio-visual in the preferred embodiment of the utility model, to provide more comprehensive service for the user.

Fig. 2 is the overall operation flowchart of the preferred embodiment of the utility model. The utility model automatically performs system initialization (initialize) S1 after starting up; after the initialization is completed, it waits for the user to issue an instruction S2 to enter the digital TV mode or enter the card reading mode. If the user chooses to enter the card reading mode, the processor 1 That is, read and process the digital photos or images stored in the memory card as described above; and if the user chooses to enter the digital TV mode, the processor 1 starts the channel selector 2 to receive S3; The digital TV channel S4 desired to watch; after selecting the channel, the channel selector 2 sends the digital signal S5 of the selected channel; the processor 1 decompresses the digital signal S6; after decompression, the selected channel can be played The image and sound S7 of the channel; thereafter, if the user has to change the channel S8, then return to step S4, and carry out the processing of another channel; if not, continue to play the program of the currently selected channel.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. All equivalent structural transformations made by using the description of the utility model and the contents of the accompanying drawings are directly or indirectly used in other related applications. Technical fields are all included in the patent scope of the present utility model in the same way.

Claims (12)

1. A portable device with both digital television and digital photo playback functions, characterized in that it comprises: Digital media processor, capable of decompressing MPEG and JPEG formats; The first memory, electrically connected to the processor, is a non-volatile memory for storing the control program executed by the processor; The second memory, electrically connected to the processor, is a volatile memory for storing temporary data generated by the processor; a user interface, electrically connected to the processor, including buttons for the user to input commands; The digital TV channel selector is electrically connected to the processor, has the ability of digital TV wave reception and demodulation, and is used to send the signal of the selected channel to the processor in MPEG-2 format; The card reader is electrically connected to the processor, and is used for inserting the memory card, and is controlled by the processor to read the digital audio-visual content stored in the memory card inserted therein; a display, electrically connected to the processor, capable of receiving and displaying image signals from the processor; an audio digital-to-analog converter, electrically connected to the processor, and converting the digital audio signal from the processor into an analog signal; Through the combination of the above components, the user can input commands through the user interface to choose to watch digital TV or view digital audio and video, and the corresponding images are displayed on the display. 2. The portable device as claimed in claim 1, wherein the first memory is a flash memory or an EEPROM. 3. The portable device as claimed in claim 1, wherein the second memory is a Synchronous Dynamic Random Access Memory. 4. The portable device as claimed in claim 1, further comprising an antenna, and the antenna is electrically connected to the tuner. 5. The portable device as claimed in claim 1, further comprising an audio amplifier, the audio amplifier is electrically connected to the audio digital-to-analog converter, to convert the analog output from the converter The audio signal is amplified for power. 6. The portable device as claimed in claim 5, further comprising a speaker electrically connected to the audio amplifier. 7. The portable device as claimed in claim 5, further comprising an earphone electrically connected to the audio amplifier. 8. The portable device as claimed in claim 1, wherein the display is a liquid crystal display. 9. The portable device according to claim 1, wherein the card reader has one or more specifications of Compact Flash, Micro Drive, Secure Digital, Multi Media Card, MemoryStick, Smart Media and xD The combination. 10. The portable device as claimed in claim 1, wherein the processor is further capable of processing TIFF format and/or RAW format. 11. The portable device as claimed in claim 1, wherein the user interface further comprises a wired or wireless remote controller. 12. The portable device as claimed in claim 1, wherein the digital audio-visual content stored in the memory card is digital photos, dynamic audio-visual or digital music.

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