CN102543128A - Audio and video decoding device and vehicle-mounted externally-connected audio and video playing device - Google Patents
Audio and video decoding device and vehicle-mounted externally-connected audio and video playing device Download PDFInfo
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- CN102543128A CN102543128A CN2010106179290A CN201010617929A CN102543128A CN 102543128 A CN102543128 A CN 102543128A CN 2010106179290 A CN2010106179290 A CN 2010106179290A CN 201010617929 A CN201010617929 A CN 201010617929A CN 102543128 A CN102543128 A CN 102543128A
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Abstract
The invention discloses an audio and video decoding device for a vehicle-mounted terminal and a vehicle-mounted externally-connected audio and video playing device. The audio and video decoding device comprises an audio and video decoding chip, an audio and video information input interface, a storage, an audio and video signal output interface and a second control interface, wherein the audio and video information input interface is connected with the audio and video decoding chip; the storage is connected with the audio and video decoding chip; the audio and video signal output interface is connected with the audio and video decoding chip; and the second control interface is connected with the audio and video decoding chip. When the vehicle-mounted terminal is used together with the audio and video playing device, video playing can be realized perfectly in a vehicle; and the audio and video decoding device is very flexible and convenient to arrange on the vehicle-mounted terminal.
Description
Technical field
The present invention relates to vehicle-mounted audio frequency and video play-back technology, particularly relate to a kind of device for decoding audio and video and a kind of corresponding vehicle-mounted circumscribed audio and video display device that is used for car-mounted terminal.
Background technology
Along with continuous advancement in technology; Present car-mounted terminal has possessed certain media play ability; Yet this media play ability is still more limited, and for example: general car-mounted terminal only can provide the voice playing function to the user, but can't video playback capability be provided to the user.The user is if want in car, to appreciate video; Then can only realize through portable audio and video display device is placed in the car voluntarily; So not only increase the user virtually and realized the cost that video is appreciated; But also brought trouble to the user, must have influence on the experience of user to car-mounted terminal or even whole vehicle.
Summary of the invention
The technical matters that the present invention will solve is can't realize the defective of video playback in order to overcome car-mounted terminal of the prior art, provide a kind of can be through realizing the device for decoding audio and video that is used for car-mounted terminal and a kind of corresponding vehicle-mounted circumscribed audio and video display device that audio frequency and video are play with being used in combination of car-mounted terminal.
The present invention solves above-mentioned technical matters through following technical proposals: a kind of device for decoding audio and video that is used for car-mounted terminal; This car-mounted terminal comprises an audio-video signal input interface, a control module, one first control interface, an audio frequency output module and a display module; This device for decoding audio and video comprises an audio/video decoding chip; Its characteristics are; This device for decoding audio and video also comprises: the audio/video information input interface that links to each other with this audio/video decoding chip is used for to this audio/video decoding chip input audio/video information; One storer that links to each other with this audio/video decoding chip, the operational data when being used to store this audio/video decoding chip decoding; The one audio-video signal output interface that links to each other with this audio/video decoding chip; Be used for exporting this audio/video decoding chip to this audio-video signal input interface from the audio-video signal that the audio/video information decoding from this audio/video information input interface obtains, play for this audio frequency output module and this display module; One second control interface that links to each other with this audio/video decoding chip is used for linking to each other with this first control interface, this audio/video decoding chip is controlled through this first and second control interface for this control module.
Wherein, this audio-video signal input interface is AUX_in interface (auxiliary input), and this audio-video signal output interface is AUX_out interface (an auxiliary output interface).
Wherein, This first and second control interface is USB interface; And this second control interface links to each other with this audio/video decoding chip through a USB-UART (Universal Asynchronous Receiver/Transmitter, universal asynchronous reception/transmitter) conversion chip.
Wherein, this audio/video information input interface comprises USB slot and/or SD card slot.
Wherein, this storer is DDR storer (a double data rate synchronous DRAM).
Another object of the present invention also is to provide a kind of vehicle-mounted circumscribed audio and video display device; It comprises a car-mounted terminal; This car-mounted terminal comprises an audio-video signal input interface, a control module, one first control interface, an audio frequency output module and a display module; Its characteristics are, this vehicle-mounted circumscribed audio and video display device also comprises an above-mentioned device for decoding audio and video that is used for car-mounted terminal.
Wherein, this control module is controlled this audio/video decoding chip to the operation of button on this car-mounted terminal and/or to the operation of button in the vehicle at this car-mounted terminal place based on the user.
Positive progressive effect of the present invention is: the present invention has carried out sufficient development and use to original various interface and the functional module that relates to the audio frequency and video playing function of car-mounted terminal; And, a kind of device for decoding audio and video that can be used in combination with car-mounted terminal is provided when being purpose with the realization video playback to the partial function that car-mounted terminal is short of.When car-mounted terminal is used in combination with this device for decoding audio and video of the present invention; Just constituted a kind of vehicle-mounted circumscribed audio and video display device that possesses voice playing function and video playback capability simultaneously, can't realize the sorry of video playback thereby ideally solved existing car-mounted terminal.In addition, the general-purpose interface that the combining of this device for decoding audio and video and car-mounted terminal is to utilize the original support of some car-mounted terminals promptly to insert and promptly pulls out realizes, so the user can select to install additional this device for decoding audio and video very neatly, and is very easy to use.
Description of drawings
Fig. 1 is the structural representation of this device for decoding audio and video of the present invention.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to specify technical scheme of the present invention.
Because this device for decoding audio and video of the present invention is exclusively used in car-mounted terminal and is used in combination, therefore carry out brief description in this some interfaces and functional module that relates to the audio frequency and video playing function on earlier to present car-mounted terminal.
Usually possess on the car-mounted terminal with lower interface and functional module: a control module, an audio-video signal input interface, one first control interface, an audio frequency output module and a display module.
This control module is the maincenter control module of this car-mounted terminal, is used for all the other each interfaces of this car-mounted terminal and the duty of functional module are controlled.
This audio-video signal input interface is used for reading in audio-video signal from the outside, and certainly, because car-mounted terminal itself does not have complete video playback capability, so this audio-video signal input interface originally only was used to read in sound signal.This audio-video signal input interface can be a for example AUX_in interface 5 ' shown in Figure 1.
This audio frequency output module then is used for amplifying output from the sound signal of this audio-video signal input interface, thereby finally realizes the voice playing function.
This display module is from hardware; Both can be used for showing that to the user this car-mounted terminal or even this car-mounted terminal belong to vehicle state information, operation information or the like; Also can be used for the menu display function when the user provides video playback; But because car-mounted terminal itself does not have complete video playback capability, so this display module originally only was used for display status information, operation information or the like.
This first control interface is an expansion interface, is used for linking to each other with the corresponding control interface of an external device.Utilize the corresponding control interface of this first control interface and this external device, this control module just can be controlled the duty of this external device.This first control interface can be a for example Universal USB interface 6 ' shown in Figure 1.
Next with reference to figure 1, the structure of this device for decoding audio and video of the present invention is described.At first; Naturally include an audio/video decoding chip 1 in this device for decoding audio and video; Be used for the audio/video information of importing this audio/video decoding chip 1 is carried out decoding processing; Thereby the audio-video signal that acquisition can supply play accordingly, this audio/video decoding chip 1 can directly adopt existing chip to realize.In addition, this device for decoding audio and video also comprises the structure that all links to each other with this audio/video decoding chip 1: an audio/video information input interface, a storer, an audio-video signal output interface and one second control interface.
This audio/video information input interface is used for from the outside to this audio/video decoding chip 1 input audio/video information.This audio/video information input interface can comprise various general-purpose interfaces; For example; USB slot 2 shown in Figure 1; This moment, this USB slot 2 linked to each other with this audio/video decoding chip 1 through usb bus, when one store the audio/video information content USB flash disk insert this USB slot 2 after, this audio/video decoding chip 1 just can read in the interior audio/video information of this USB flash disk and it is carried out decoding processing.Again for example; This audio/video information input interface can also be SD card slot shown in Figure 13; This moment, this SD card slot 3 linked to each other with this audio/video decoding chip 1 through the SD bus; When one store the audio/video information content the SD card insert this SD card slot 3 after, this audio/video decoding chip 1 just can read in the audio/video information in this SD card and it is carried out decoding processing.The present invention does not limit kind and the quantity as the general-purpose interface of this audio/video information input interface.
This storer is used to store the operational data of this audio/video decoding chip 1 when decoding.This storer can be DDR storer 4 for example shown in Figure 1, and this moment, this DDR storer 4 linked to each other with this audio/video decoding chip 1 through Memory bus (rambus).
This audio-video signal output interface is used for the audio-video signal that 1 decoding obtains to this audio/video decoding chip and exports.When this device for decoding audio and video is used in combination with above-mentioned car-mounted terminal; This audio-video signal output interface will be pegged graft with the audio-video signal input interface coupling of this car-mounted terminal; And will input to this car-mounted terminal from the audio-video signal of this audio/video decoding chip 1 audio-video signal input interface through this car-mounted terminal, the smooth playing that finally realizes audio frequency and video with the audio frequency output module that utilizes this car-mounted terminal and display module.When the audio-video signal input interface of this car-mounted terminal is AUX_in interface 5 '; Correspondingly; This audio-video signal output interface should be AUX_out interface 5 shown in Figure 1, and being connected between this moment this AUX_out interface 5 and this audio/video decoding chip 1 comprises: L channel L, R channel R, video bus CVBS and ground connection GND.
This second control interface is an expansion interface, is used for linking to each other with the corresponding control interface of an external device.When this device for decoding audio and video is used in combination with above-mentioned car-mounted terminal; This second control interface will be pegged graft with first control interface coupling of this car-mounted terminal; And will transfer to this audio/video decoding chip 1, thereby make the control module of this car-mounted terminal to control to the duty of this audio/video decoding chip 1 from the control command of the control module of this car-mounted terminal.When first control interface of this car-mounted terminal is USB interface 6 '; Correspondingly; This second control interface should be USB interface shown in Figure 16, and at this moment, this USB interface 6 will link to each other with this audio/video decoding chip 1 through a USB-UART conversion chip 7 shown in Figure 1; Promptly this USB-UART conversion chip 7 links to each other with this USB interface 6 through usb bus on the one hand, then links to each other with this audio/video decoding chip 1 through the UART bus on the other hand.
After on existing car-mounted terminal, having installed this device for decoding audio and video of the present invention additional, they just integral body constituted a vehicle-mounted circumscribed audio and video display device.When USB flash disk or the SD cards etc. that will store the audio/video information content as the user inserted this device for decoding audio and video, this car-mounted terminal just can be realized the smooth playing to this audio/video information.At this moment, the user just can realize through the button on this car-mounted terminal is operated the control of audio frequency and video broadcast.At present in some vehicles; Because the user can pass through the button in the vehicle; For example the button on the bearing circle is operated this car-mounted terminal is controlled, and therefore in this case, the control that the user plays audio frequency and video also can realize through the button in this vehicle is operated.
In sum, the invention provides a kind of device for decoding audio and video that can be used in combination with car-mounted terminal.When car-mounted terminal is used in combination with this device for decoding audio and video of the present invention; Just ideally solve existing car-mounted terminal and can't realize the sorry of video playback; And the user can also select to install additional this device for decoding audio and video very neatly, and is very easy to use.
Though more than described embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited appended claims.Those skilled in the art can make numerous variations or modification to these embodiments under the prerequisite that does not deviate from principle of the present invention and essence, but these changes and modification all fall into protection scope of the present invention.
Claims (7)
1. device for decoding audio and video that is used for car-mounted terminal; This car-mounted terminal comprises an audio-video signal input interface, a control module, one first control interface, an audio frequency output module and a display module; This device for decoding audio and video comprises an audio/video decoding chip; It is characterized in that this device for decoding audio and video also comprises:
The one audio/video information input interface that links to each other with this audio/video decoding chip is used for to this audio/video decoding chip input audio/video information;
One storer that links to each other with this audio/video decoding chip, the operational data when being used to store this audio/video decoding chip decoding;
The one audio-video signal output interface that links to each other with this audio/video decoding chip; Be used for exporting this audio/video decoding chip to this audio-video signal input interface from the audio-video signal that the audio/video information decoding from this audio/video information input interface obtains, play for this audio frequency output module and this display module;
One second control interface that links to each other with this audio/video decoding chip is used for linking to each other with this first control interface, this audio/video decoding chip is controlled through this first and second control interface for this control module.
2. the device for decoding audio and video that is used for car-mounted terminal as claimed in claim 1 is characterized in that, this audio-video signal input interface is the AUX_in interface, and this audio-video signal output interface is the AUX_out interface.
3. the device for decoding audio and video that is used for car-mounted terminal as claimed in claim 1 is characterized in that, this first and second control interface is USB interface, and this second control interface links to each other with this audio/video decoding chip through a USB-UART conversion chip.
4. the device for decoding audio and video that is used for car-mounted terminal as claimed in claim 1 is characterized in that, this audio/video information input interface comprises USB slot and/or SD card slot.
5. the device for decoding audio and video that is used for car-mounted terminal as claimed in claim 1 is characterized in that, this storer is the DDR storer.
6. vehicle-mounted circumscribed audio and video display device; It comprises a car-mounted terminal; This car-mounted terminal comprises an audio-video signal input interface, a control module, one first control interface, an audio frequency output module and a display module; It is characterized in that this vehicle-mounted circumscribed audio and video display device also comprises just like any described device for decoding audio and video that is used for car-mounted terminal among the claim 1-5.
7. vehicle-mounted circumscribed audio and video display device as claimed in claim 6; It is characterized in that this control module is controlled this audio/video decoding chip to the operation of button on this car-mounted terminal and/or to the operation of button in the vehicle at this car-mounted terminal place based on the user.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106179290A CN102543128A (en) | 2010-12-30 | 2010-12-30 | Audio and video decoding device and vehicle-mounted externally-connected audio and video playing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106179290A CN102543128A (en) | 2010-12-30 | 2010-12-30 | Audio and video decoding device and vehicle-mounted externally-connected audio and video playing device |
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| CN102543128A true CN102543128A (en) | 2012-07-04 |
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| CN2010106179290A Pending CN102543128A (en) | 2010-12-30 | 2010-12-30 | Audio and video decoding device and vehicle-mounted externally-connected audio and video playing device |
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Cited By (2)
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| CN106911983A (en) * | 2017-01-10 | 2017-06-30 | 硅谷数模半导体（北京）有限公司 | The control method and system of audio frequency and video protocol conversion chip |
| CN112948303A (en) * | 2021-03-17 | 2021-06-11 | 北京睿芯高通量科技有限公司 | Audio and video decoding device and method for adapting server by taking U.2 as transmission interface |
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| CN112948303A (en) * | 2021-03-17 | 2021-06-11 | 北京睿芯高通量科技有限公司 | Audio and video decoding device and method for adapting server by taking U.2 as transmission interface |
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Application publication date: 20120704 |