CN101556533A - Video and audio multimedia computer system with video output expansion function - Google Patents

Abstract

A video and audio multimedia computer system with function of expanding video output, can broadcast the multimedia source of the storage media, the system includes display device, video output interface and control module, the control module has processing unit of the computer, multimedia processing unit and outputs the switching circuit, when the system is not started, the multimedia processing unit can be used for processing the multimedia source of the storage media; the output switching circuit is provided with input ports X1 and X2 and output ports Y1 and Y2, wherein the input ports X1 and X2 are respectively coupled with the computer processing unit and the multimedia processing unit, and the output ports Y1 and Y2 are respectively coupled with the display device and the video output interface; thus, the switching of any input from the computer processing unit or the multimedia processing unit can be set, and the switching of any output to the display device and the video output interface can be selected.

Description

Audio-visual multimedia computer system with extended video output function

This application is a divisional application of the following patent application:

Application number: 200510067444.8

Application date: April 21, 2005

Title of Invention: Audio-visual multimedia computer system with extended video output function

technical field

The invention relates to a computer system capable of playing audio-visual multimedia without starting up, in particular to an audio-visual multimedia computer system which can simplify system design and has extended video output function.

Background technique

Due to the popularity of electronic technology, various electronic devices such as personal computers, notebook computers, and personal digital assistants have become part of modern people's lives. In addition to document processing, functions such as accessing the Internet or entertainment audio-visual are also necessary for busy work. Added a lot of leisure fun.

In terms of entertainment audio-visual functions, it is generally used to read audio-visual multimedia discs such as VCD, DVD, etc. After the computer system is turned on, the screen and speakers of the computer system can be used to watch images (Video) and listen to audio (Audio) effects. When the system is turned off, the optical drive cannot be operated. Therefore, before viewing audio-visual multimedia, the computer system must still be turned on and wait for the host computer to load the operating system (Operation System), which is very inconvenient.

Aiming at the aspect that the computer can provide an operating optical drive when the computer is turned off, US Patent Nos. 6,279,056, 6,266,714, 6,006,285 and other cases disclose computers that can switch between PC mode and Audio CD mode. The device is a computer system that uses the system management interrupt signal or uses the optical drive itself to play music, so that the computer system can play music when the operating system, optical drive driver and application program are not fully loaded.

As shown in Figure 1, it is a computer system 1 that can still play audio-visual multimedia under the state that the inventor of this case proposed in the national application No. 93109678, and can still play audio-visual multimedia. It is a multimedia source 3 that cooperates with a display 2 to play storage media, and the computer system 1 can be a personal computer, a notebook computer, or other electronic devices with a reading device 12 capable of reading a multimedia source 3 of a storage medium, and in addition to the aforementioned reading device 12, the computer system 1 also includes a power supply 11. Switching circuit 13 , computer host 14 , media processing unit 15 , and display control unit 16 .

Among them, the power supply 11 is used to supply power to the reading device 12, the switching circuit 13, the computer host 14, and the media processing unit 15, and the reading device 12 is used to read the multimedia source 3 of the storage medium and generate a data signal 101 For the switch circuit 13, the switch circuit 13 is used to switch the computer system 1 between "computer mode" and "multimedia mode", and the computer host 14 is used to perform general computer functions, and it can output a host signal 102 to display control The unit 16 displays the computer screen through the monitor 2 electrically connected to the display control unit 16 .

When the switching circuit 13 is in "computer mode", the reading device 12 is electrically connected to the host computer 14 through the switching circuit 13, and the host computer 14 can receive the data signal 101 output by the switching circuit 13 and output the host signal 102, displaying After receiving the host signal 102 , the control unit 16 outputs the signal to the display 2 to present general operating system or other program screens.

When the switching circuit 13 is switched to the "multimedia mode", the reading device 12 is electrically connected to the media processing unit 15 through the switching circuit 13, so that the media processing unit 15 can receive the data signal 101 sent by the switching circuit 13, and pass through After processing, the multimedia signal 103 is output to the display control unit 16. After the display control unit 16 receives the multimedia signal 103, the multimedia signal 103 is adjusted to an appropriate size according to its input screen size scaling (scaling), and then output to the display 2 for presentation and playback. The multimedia signal 103 , whereby even if the host computer 14 is not turned on, the multimedia source 3 of the storage medium can still be read by the reading device 12 and played by the media processing unit 15 .

However, in the aforementioned design mode, after the display control unit 16 receives the host signal 102 output by the computer host 14 under the "computer mode", or the multimedia signal 103 output by the multimedia processing unit 15 under the "multimedia mode", the display control unit 16 must be identified as "computer mode" or "multimedia mode" specification video, and then scaled to meet the acceptable format of the display 2, thus increasing the complexity of system design and system development time.

Contents of the invention

Therefore, an object of the present invention is to provide an audio-visual multimedia computer system with extended video output function that does not need to distinguish between "computer mode" and "multimedia mode" specifications, and can be output as a format acceptable to the display. .

Another object of the present invention is to provide a video that can receive "computer mode" or "multimedia mode" specifications, and can output to an external display acceptable format through the system's built-in video output interface with extended video output function audio-visual multimedia computer system.

Therefore, the audio-visual multimedia computer system with extended video output function of the present invention is a multimedia source for playing storage media. The audio-visual multimedia computer system includes a display device, a video output interface and a control module. The video signal from the multimedia source is sent to an external display device for display, and the control module is electrically connected to the display device and the video output interface.

The control module has a computer processing unit, a multimedia processing unit and an output switching circuit. When the system is turned on, the computer processing unit is in a computer operation mode, receiving the multimedia source of the storage medium, and outputting a host signal conforming to the playback format of the display device ; When the system is not turned on, the multimedia processing unit can be set to a multimedia processing mode, and the multimedia source used to process the storage medium is a multimedia signal that conforms to the playback format of the display device.

The output switching circuit is electrically connected to the computer processing unit, the multimedia processing unit and the display device, the output switching circuit has input ports X1, X2 and output ports Y1, Y2, and the input ports X1, X2 are respectively coupled to the computer processing unit With the multimedia processing unit, the output ports Y1 and Y2 are respectively coupled to the built-in display device and the video output interface.

Thereby, the input ports X1 and X2 of the output switching circuit can be set to be switched from any input of the computer processing unit or the multimedia processing unit, and the output ports Y1 and Y2 can be selected to be switched to the display device and the video output Any output of the interface.

The present invention has the audio-visual multimedia computer system with extended video output function, since the host signal processed and output by the computer processing unit from the multimedia source of the storage medium, and the multimedia signal processed and output by the multimedia processing unit, both are output to the output switching circuit Before, it has been pre-converted to conform to the playback format of the display device, so the output switching circuit only needs to switch the signal to output to the display device for display, and there is no need to set up another display control unit to distinguish whether it is a computer mode or a multimedia mode specification. Video, in addition to simplifying the design of the system, can also be connected with other display devices, which expands the video output function of the audio-visual multimedia computer system.

Description of drawings

Fig. 1 is a block diagram of a circuit, illustrating the computer system that can still play audio-visual multimedia in the state of non-startup proposed in the national application No. 93109678; and

FIG. 2 is a circuit block diagram illustrating a preferred embodiment of the audio-visual multimedia computer system with extended video output function of the present invention.

[Description of main component labels]

100 Audio-visual multimedia computer system 21 Card reading device

101 Selection signal 22 Optical drive

1 Control Module 23 Storage Device

11 Computer processing unit 31 Display device

12 Multimedia processing unit 32 Audio playback device

131～133 Input switching circuit 33 Video output device

134 Output switching circuit 5 Storage media

14 Power amplifier 51 Memory card

2 reading device 52 audio-visual disc

Detailed ways

The aforementioned and other technical content, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings.

As shown in Figure 2, the preferred embodiment of the audio-visual multimedia computer system 100 of the present invention has expanded video output function, is used to play the multimedia source of storage medium 5, and this embodiment comprises control module 1, reading device 2, display device 31 , audio playback device 32 and video output interface 33 .

The reading device 2 of the present embodiment is illustrated by taking the card reading device 21, the optical drive 22 and the storage device 23 as examples, wherein, the storage medium 5 read by the card reading device 21 is a memory card 51, and the storage medium 5 read by the optical drive 22 is The storage medium 5 is a laser video disc 52, and the storage device 23 is a general hard disk (Hard disk). However, as I know, the reading device 2 and the storage medium 5 also have, for example, a high-speed bus transmission interface (such as: USB interface) and its corresponding portable storage device (such as: USB flash drive), etc., are therefore also applicable to the scope covered by the concept of the present invention.

The display device 31 of the present embodiment is a built-in liquid crystal display screen of the audio-visual multimedia computer system 100; the audio playback device 32 is a loudspeaker; the video output interface 33 is to meet any video specification of LVDS, S-Video, CVBS and RGB, and The video output interface 33 is used to transfer the video signal to an external display device (not shown) for display.

The control module 1 of this embodiment has a computer processing unit 11 , a multimedia processing unit 12 , three sets of input switching circuits 131 - 133 , an output switching circuit 134 and a power amplifier 14 .

Wherein, the computer processing unit 11 is electrically connected to the output switching circuit 134. With the switching function of the switching circuit 134, the computer processing unit 11 can select the host signal output by it, and send it to any one of the display device 31 and the video output interface 33. type of output.

The multimedia processing unit 12, the input switching circuits 131-133, the output switching circuit 134, and the power amplifier 14 are all electrically connected to the computer processing unit 11 and the multimedia processing unit 12, and the three sets of input switching circuits 131-133 are respectively electrically connected to the storage device 23. The optical drive 22 and the card reader 21; the output switching circuit 134 is electrically connected to the display device 31 and the video output interface 33; the power amplifier 14 is electrically connected to the audio playback device 32 for amplifying the audio signal of the video signal for audio playback Device 32 broadcasts.

It must be noted that the computer processing unit 11 and the multimedia processing unit 12 have separate power supply paths, therefore, by setting the triggers of the control keys (not shown) that belong to different modes of power activation to start the power supply in different modes, it is convenient You can choose to operate in computer operation mode or multimedia processing mode.

In addition, the present invention sets the control right of the computer operation mode as a priority, so even if the control key representing the start of the multimedia processing mode is accidentally touched in the computer operation mode, the multimedia processing mode will not be entered; , if the control key representing starting the computer operation mode is triggered, it will be forced to enter the computer operation mode.

When the control key representing the computer operation mode is pressed, the audio-visual multimedia computer system 100 enters the power-on state, and the computer processing unit 11 can judge whether there is a storage medium 5 in the reading device 2. When the presence of the storage medium 5 is detected, Then enter the computer operation mode to play the audio-visual signal loaded from the storage medium 5; similarly, when the control key representing the multimedia processing mode is pressed, the audio-visual multimedia computer system 100 enters the state of the multimedia processing mode, and the multimedia processing unit 12 can judge to read Whether there is the storage medium 5 in the fetching device 2, when detecting the existence of the storage medium 5, then enter the multimedia processing mode to play the audio-visual signal loaded from the storage medium 5.

The multimedia processing unit 12 has a display controller 121 , which is electrically connected to the output switching circuit 134 , receives multimedia signals, and scales the signal input to conform to the playback format of the display device 31 .

In this embodiment, the input/output switching circuits 131-134 are mainly composed of an integrated circuit or a plurality of MOSFET circuits. The source of the signal 101 is to set the selection signal 101 by the user by pressing a button (not shown) outside the audio-visual multimedia computer system 100 or operating a remote control, and at the same time, the OSD (On Screen Display; direct The screen display) form is processed by the display control unit 14 to present function options on the display device 31 , so as to facilitate the switch setting of the selection signal 101 .

When the audio-visual multimedia computer system 100 is turned on, it enters the computer operation mode, and simultaneously sets the selection function of the input/output switching circuits 131-134, so that X1 to Y of each input switching circuit 131-133, and the output switching circuit 134 The path from X1 to Y1 or Y2 is conductive, so all commands are controlled by the computer processing unit 11; and when the audio-visual multimedia computer system 100 is not turned on, it enters the multimedia processing mode by pressing a button or operating a remote controller, and can be set at the same time. The selection function of the fixed switching circuits 131-134 makes the path from X2 to Y of each input/output switching circuit 131-134, and the path from X2 to Y1 or Y2 of the output switching circuit 134 be conduction, so it can be turned on in the off state. , the multimedia processing unit 12 processes and plays the video and audio signals.

Since the input switching circuits 131 - 133 are respectively electrically connected to the storage device 23 , the optical drive 22 and the card reading device 21 , data can be read regardless of whether the device is powered on or not.

In addition to having the input ports X1 and X2 respectively coupled to the computer processing unit 11 and the multimedia processing unit 12, different from the input switching circuits 131-133, the output switching circuit 134 also has the input ports X1 and X2 respectively coupled to the built-in display device 31 and the video output Output ports Y1 , Y2 of the interface 33 .

The working principle of the output switching circuit 134 is mainly to receive the video signals output by the computer processing unit 11 and the multimedia processing unit 12 through the input ports X1 and X2, and selectively output any one of the host signal and the multimedia signal; in addition, The output switching circuit 134 uses the difference between the power supply signals of the computer multimedia processing unit 11 and the multimedia processing unit 12 as a control signal to determine whether the output port is Y1 or Y2, and the video signal can be output to the display device 31 through the output ports Y1 and Y2 Or through the video output interface 33, any one of the external display devices (not shown) can be displayed.

To sum up the above, the present invention has an audio-visual multimedia audio-visual multimedia computer system 100 with extended video output function. Since the multimedia source of the storage medium 2 is processed by the computer processing unit 11 to process the output of the host signal and the multimedia signal processed by the multimedia processing unit 12, two Before outputting to the output switching circuit 134, it has been pre-converted to the playback format conforming to the display device 31 or the video output interface 33, so the output switching circuit 134 can directly output to the display device 31 or the video output interface 33 only by switching the signal As shown, in addition to simplifying the design of the system, since other display devices can be connected externally through the video output interface 33 , the video output function of the audio-visual multimedia computer system 100 is also expanded.

But what is described above is only a preferred embodiment of the present invention, and should not limit the scope of the present invention with this, that is, all simple equivalent changes and modifications made according to the claims of the present invention and the content of the description of the invention, All still belong to the scope covered by the claims of the present invention.

Claims (6)

1. An audio-visual multimedia computer system with extended video output function, which is used to play the multimedia source of the storage medium. The audio-visual multimedia computer system includes: display device; reading device; A video output interface, which can be used to transfer the video signal of the multimedia source to an external display device for display; and The control module is electrically connected to the display device and the video output interface, and has: The computer processing unit, if the system is in a computer operation mode when it is turned on, receives the multimedia source of the storage medium, and outputs a host signal that conforms to the playback format of the display device; A multimedia processing unit, which can be set to a multimedia processing mode when the system is not powered on, and the multimedia source used to process the storage medium is a multimedia signal conforming to the playback format of the display device; and An output switching circuit electrically connected to the computer processing unit, the multimedia processing unit and the display device, the output switching circuit has input ports X1, X2 and output ports Y1, Y2, and the input ports X1, X2 are respectively coupled to the computer processing unit and the multimedia processing unit, the output ports Y1 and Y2 are respectively coupled to the built-in display device and the video output interface, Among them, the input ports X1 and X2 of the output switching circuit can be set to be switched from any input of the computer processing unit or the multimedia processing unit, and the output ports Y1 and Y2 can be selected to be switched to the display device and the video output interface Either output, Wherein, the multimedia processing unit has a display controller, the display controller is electrically connected to the input port X2 of the output switching circuit, receives the multimedia signal and scales the signal input to conform to the playback format of the display device, Wherein, the control module also has an input switching circuit, the reading device is used to load the audio-visual signal of the storage medium, the input switching circuit is electrically connected to the reading device, the computer processing unit and the multimedia processing unit, when the computer When the system is not turned on, the multimedia processing unit judges whether there is the storage medium in the reading device, and when the storage medium is detected, enters the multimedia processing mode to play the video and audio loaded from the storage medium Signal. 2. The audio-visual multimedia computer system with extended video output function according to claim 1, wherein the video output interface conforms to any one of the video standards of LVDS, S-Video, CVBS and RGB. 3. The audio-visual multimedia computer system with extended video output function according to claim 1, wherein the reading device is a card reading device, and the storage medium is a memory card. 4. The audio-visual multimedia computer system with extended video output function according to claim 1, wherein the reading device is an optical drive, and the storage medium is a laser disc. 5. The audio-visual multimedia computer system with extended video output function according to claim 1, wherein the reading device is a high-speed bus transmission interface, and the storage medium is a portable storage device corresponding to the transmission interface. 6. The audio-visual multimedia computer system with extended video output function according to claim 1, wherein the switching circuit is composed of an integrated circuit or a plurality of MOSFET circuits.

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