CN2591661Y - Multipurpose video-audio player - Google Patents
Multipurpose video-audio player Download PDFInfo
- Publication number
- CN2591661Y CN2591661Y CN 02259225 CN02259225U CN2591661Y CN 2591661 Y CN2591661 Y CN 2591661Y CN 02259225 CN02259225 CN 02259225 CN 02259225 U CN02259225 U CN 02259225U CN 2591661 Y CN2591661 Y CN 2591661Y
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- bus
- circuit
- video
- audio
- driver
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- Expired - Fee Related
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- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
The utility model relates to a multipurpose video-audio player, which can be used as an external driver of a computer. The multipurpose video-audio player is provided with an audio-video processing circuit, a bus switching circuit and a system control circuit; after the bus switching circuit which is connected with a driver bus switches the driver bus to a USB bus, the driver bus is connected to a B type USB interface to cause other USB host devices to carry out data reading and writing and other control operations on a driver which is arranged in the multipurpose video-audio player through the USB interface; the driver bus is simultaneously connected to the audio-video processing circuit and the bus switching circuit; the working condition of the multipurpose video-audio player is automatically controlled by the system control circuit; when the system control circuit can not detect that other devices are connected to the USB bus, the control circuit causes the audio-video processing circuit to occupy the control power of the driver bus; when the system control circuit detects that other devices are connected to the USB bus, the control circuit causes the audio-video processing circuit to give up the control power of the driver bus to cause the bus switching circuit to occupy the control power of the driver bus. When the multipurpose video-audio player is singly used, the multipurpose video-audio player can complete the functions of video-audio recording and a player; when the multipurpose video-audio player is connected to the computer through the USB bus, the multipurpose video-audio player automatically changes into the external driver of the computer.
Description
Affiliated technical field
The utility model relates to a kind of DVD player, especially not only can use but also can be used as the multi-usage DVD player that the computer external drive is used separately as DVD player.
Background technology
At present, known audio-visual recording/player, for example, DVD video disc player, DVD video recording player, hard disc recording player etc. are made up of driver that is used to read and write data and the audio frequency and video treatment circuit that is attached thereto usually.Used driver has DVD-ROM, DVD-RAM, DVD-RW, DVD+RW, CD-RW and hard disk etc., they have the bus interface of a standard usually, for example, ide interface, ATAPI interface, scsi interface etc., external circuit comes access data by this bus interface.In DVD player, audio frequency and video treatment circuit playback record from driver is handled (for example decompression, filtering, coding, digital-to-analog conversion) after the data on the medium (CD or disk), reduction of data is become video-audio signal, after perhaps the audio-video signal of importing being carried out certain processing (for example analog/digital conversion, filtering, compression and packing), be written on the storage medium (CD or disk) by driver again.This DVD player does not connect driver with external unit interface, external unit (for example computer) can not directly carry out data access operation to the driver that is installed in this player, thereby they can not use as the external drive of computer.
On the other hand, the computer external drive of band USB interface is made of the interface circuit that drive bus converts usb bus to a driver and one, and the computer expert crosses USB interface and is connected with it, reads and writes data from driver.This external drive is except a driver, only comprise and convert drive bus to the interface circuit of usb bus and some other all in auxiliary circuits such as power supply supplies, it does not comprise and will read or the data of write driver are carried out the circuit that audio frequency and video are handled, so they can not use as DVD player.
Summary of the invention
Can not be in order to overcome existing DVD player as the deficiency that the computer external drive is used and existing computer external drive can not be used as DVD player, the utility model provides a kind of multi-usage DVD player, it both can be used as DVD player and had used separately, can be connected with computer again as the external drive of computer to use.
The technical scheme that its technical matters that solves the utility model adopts is: be connected to one when the bus interface with the DVD player driver is connected to the sound processing circuit drive bus is transformed into the interface circuit of usb bus, make other equipment (for example computer) to carry out data access control to the driver that is installed in this player by USB interface.This player is when independent the use, and bus switching circuit is not worked, and driver is by the control of sound processing circuit, and sound processing circuit operate as normal is finished audio-visual broadcast or recorded audio-visual the recording that it can be led to as a Daepori this moment/player use.When this machine by USB interface and other equipment (for example computer) when being connected, the sound processing circuit is not worked, the bus switching circuit operate as normal, driver is controlled by USB interface by external unit, and this moment, this machine was equivalent to the external drive of a band USB interface.Make this machine both can be used as the DVD player use thereby reach, can be used as the purpose of the external drive use of computer again.
The beneficial effects of the utility model are that DVD player is used as the external drive of computer.Owing to only increase a bus switching circuit, circuit is simple, is easy to realize.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is circuit theory diagrams of the present utility model.
1-driver among the figure, 2-bus switching circuit, 3-system, control circuit, 4-audio frequency and video treatment circuit, 5-USB interface, 6-audio frequency and video output/input interface, 7-drive bus, 8-drive bus, 9-drive bus, 10-the-control bus, 11-the second control bus, 12-audio-video signal line, 13-usb bus
Embodiment
In Fig. 1, driver 1 is connected with audio frequency and video treatment circuit 4 with bus switching circuit 2 by drive bus 7,8,9, bus switching circuit 2 is connected to a Type B USB interface 5 by usb bus 13, audio frequency and video treatment circuit 4 is connected to audio frequency and video output/input interface 6 by audio-video signal line 12, and system, control circuit 3 is connected with audio frequency and video treatment circuit 4 with bus switching circuit 2 with second control bus 11 by first control bus 10 respectively.
When system, control circuit 3 detects other equipment (for example computer) when being connected to this machine by USB interface 5, it can send number control signal, make audio frequency and video treatment circuit 4 abdicate control to drive bus 7,8,9, bus switching circuit 2 is operate as normal then, occupy control to drive bus 7,8,9, make external equipment carry out data access operation to driver 1, this moment, this machine was equivalent to the external drive of a band USB interface.
When system, control circuit 3 detects when being connected with this machine by USB interface 5 less than other equipment (for example computer), it can send the other control signal, make bus switching circuit 2 abdicate control to drive bus 7,8,9, audio frequency and video treatment circuit 4 is operate as normal then, occupy control to drive bus 7,8,9, can carry out data access operation to driver 1, thereby realize the playing function of video-audio signal, this moment, this machine was equivalent to a DVD player.
Preferably, audio frequency and video treatment circuit, bus switching circuit and system, control circuit can be realized by same integrated circuit.
Claims (6)
1. DVD player, this player has the audio frequency and video treatment circuit that is connected on the drive bus, it is characterized in that: this player also comprises a bus switching circuit that is connected on the drive bus, this bus switching circuit is transformed into usb bus with drive bus: also comprise a system, control circuit that is connected between audio frequency and video treatment circuit and the bus switching circuit, when the system, control circuit detection is connected to said usb bus less than other equipment, this control circuit makes the audio frequency and video treatment circuit occupy the control of drive bus, when system, control circuit detects other equipment and is connected to said usb bus, this control circuit makes the audio frequency and video treatment circuit abdicate the control of drive bus, makes bus switching circuit occupy control to drive bus.
2. DVD player according to claim 1 is characterized in that also comprising audio frequency, the video signal interface that is connected with the audio frequency and video treatment circuit and is connected Type B USB interface on the usb bus.
3. DVD player according to claim 1 and 2 is characterized in that audio frequency and video treatment circuit, bus switching circuit and system, control circuit realized by same integrated circuit.
4. video/audio recording/playing machine, this videocorder has the audio frequency and video treatment circuit that is connected on the drive bus, it is characterized in that: this videocorder also comprises a bus switching circuit that is connected on the drive bus, and this bus switching circuit is transformed into usb bus with drive bus; Also comprise a system, control circuit that is connected between audio frequency and video treatment circuit and the bus switching circuit, when the system, control circuit detection is connected to said usb bus less than other equipment, this control circuit makes the audio frequency and video treatment circuit occupy the control of drive bus, when system, control circuit detects other equipment and is connected to said usb bus, this control circuit makes the audio frequency and video treatment circuit abdicate the control of drive bus, makes bus switching circuit occupy control to drive bus.
5. video/audio recording/playing machine according to claim 4 is characterized in that also comprising audio frequency, the video signal interface that is connected with the audio frequency and video treatment circuit and is connected Type B USB interface on the usb bus.
6. according to claim 4 or 5 described video/audio recording/playing machines, it is characterized in that audio frequency and video treatment circuit, bus switching circuit and system, control circuit realized by same integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02259225 CN2591661Y (en) | 2002-10-05 | 2002-10-05 | Multipurpose video-audio player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02259225 CN2591661Y (en) | 2002-10-05 | 2002-10-05 | Multipurpose video-audio player |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2591661Y true CN2591661Y (en) | 2003-12-10 |
Family
ID=33726702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02259225 Expired - Fee Related CN2591661Y (en) | 2002-10-05 | 2002-10-05 | Multipurpose video-audio player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2591661Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375181C (en) * | 2003-11-03 | 2008-03-12 | 联想(北京)有限公司 | Wireless multimedia recording and playing system and method |
-
2002
- 2002-10-05 CN CN 02259225 patent/CN2591661Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375181C (en) * | 2003-11-03 | 2008-03-12 | 联想(北京)有限公司 | Wireless multimedia recording and playing system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: He Haifeng Document name: Notification of Termination of Patent Right |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |