CN102932683A - Mobile high-definition link (MHL) realizing method and video playing device - Google Patents
Mobile high-definition link (MHL) realizing method and video playing device Download PDFInfo
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- CN102932683A CN102932683A CN2012104172332A CN201210417233A CN102932683A CN 102932683 A CN102932683 A CN 102932683A CN 2012104172332 A CN2012104172332 A CN 2012104172332A CN 201210417233 A CN201210417233 A CN 201210417233A CN 102932683 A CN102932683 A CN 102932683A
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Abstract
The invention discloses a mobile high-definition link (MHL) realizing method, which comprises the steps of: detecting whether a function of a remote controller for selecting a USB (Universal Serial Bus) interface is a MHL function by a system chip; if so, outputting an MHL control signal, controlling a signal switch to gate an MHL function channel and send an MHL signal to an MHL chip; after the MHL chip converts the received MHL signal into an HDMI (High-definition Multimedia Interface) signal, sending the HDMI signal to the system chip; and receiving and processing the HDMI signal by the system chip. The invention further discloses a video playing device, wherein a common USB interface of the video playing device is compatible with the MHL function, so that the performance of the video playing device is improved, the user experience is promoted, and the use cost of users is reduced.
Description
Technical field
The present invention relates to the video playback field, relate in particular to implementation method and video play device that a kind of mobile high definition connects.
Background technology
Based on present emerging MHL(Mobile High-Definition Link, mobile high definition connects) technology, mobile phone, PAD(Pure Audio Design, panel computer), the equipment such as digital camera, digital code camera, portable digital player all will be opened the MHL Age of Technology, correspondingly some video play device has also increased the MHL function such as television set.
For in the market with the video play device of MHL function, because HDMI(High-Definition Multimedia Interface, HDMI (High Definition Multimedia Interface)) than traditional DVI(Digital Visual Interface, digital visual interface) more advanced and convenient, therefore, video play device with the MHL function all adopts the HDMI interface basically in the market, and the equipment with HDMI has the characteristics of " plug and play ", can automatically carry out " negotiation " between signal source and the display device, automatically select only video/audio format.
But it is perfect that existing video play device with the MHL function still needs aspect a lot; Such as, the data-signal of self need to be outputed to on the video play device of MHL function the time with the mobile device of MHL function, just need a USB(Universal Serial Bus, USB) the interface adapter that turns HDMI could use the MHL function, various problems appear in this patchcord easily when data transaction and transmission, cause the out of use problem of MHL function such as occurring inevitably because of reasons such as this patchcord loose contacts, this will reduce user's experience greatly, increase again user's use cost simultaneously; And the UI(User Interface of existing video play device, user interface) source(resource) interface does not have this passage of MHL information source, and very inconvenient user is in the use of this function of MHL of using video play device.
Summary of the invention
Main purpose of the present invention provides implementation method and the video play device that a kind of mobile high definition connects, and is intended to solve the problem that the video play device mobile high definition connects, and saves cost.
The invention discloses a kind of video play device, comprising: System on Chip/SoC, signaling switch, MHL chip and USB interface, wherein,
Described USB interface is for MHL function or the USB function of selecting USB interface;
Described System on Chip/SoC, be used for detect selection be the MHL function of USB interface the time, output MHL control signal is controlled described signaling switch gating MHL function passage and is sent the MHL signal; Also be used for, receive and process and process the HDMI signal that returns behind the described MHL signal through the MHL chip;
Described MHL chip is used for receiving the described MHL signal that described signaling switch sends, described MHL signal is converted to described HDMI signal after, be sent to described System on Chip/SoC;
Signaling switch is used for the described MHL control signal according to described System on Chip/SoC output, gating MHL function passage, and send described MHL signal to described MHL chip.
Preferably, described System on Chip/SoC also is used for: detect selection be the USB function of USB interface the time, output USB control signal is controlled described signaling switch gating USB function passage and is sent usb signal; Also be used for, receive and process described usb signal;
Described signaling switch also is used for: according to the described USB control signal of described System on Chip/SoC output, gating USB function passage also sends usb signal to described System on Chip/SoC.
Preferably, described System on Chip/SoC be used for to receive and processes and processes the HDMI signal that returns behind the described MHL signal through described MHL chip and specifically comprise:
Described System on Chip/SoC is used for, and receives described HDMI signal, described HDMI signal is converted to Low Voltage Differential Signal LVDS signal after, export display screen to and be used for to show.
Preferably, described System on Chip/SoC is used for receiving and processing described usb signal specifically comprising:
Described System on Chip/SoC is used for, and receives described usb signal, described usb signal is converted to the LVDS signal after, export display screen to and be used for to show.
The present invention also discloses the implementation method that a kind of mobile high definition connects, and may further comprise the steps:
What step S01, detection were selected is MHL function or the USB function of USB interface;
If what step S02 selected is the MHL function, then control gating MHL function passage, carry out the MHL function treatment.
Preferably, described step S02 specifically comprises:
Output MHL control signal, control signal switching gate MHL function passage also sends the MHL signal;
After receiving described MHL signal and described MHL signal being converted to the HDMI signal described HDMI signal is processed.
Preferably, described described HDMI signal is processed comprises:
After described HDMI signal is converted to the LVDS signal, export display screen to, be used for showing.
Preferably, the method that described mobile high definition connects also comprises:
If what step S03 selected is the USB function, then controls gating USB function passage and carry out common USB function treatment.
Preferably, described step S03 specifically comprises:
Output USB control signal, control signal switching gate USB function passage also sends usb signal;
Receive described usb signal and described usb signal is processed.
Preferably, described System on Chip/SoC receives and processes described usb signal and comprises:
After described usb signal is converted to the LVDS signal, export display screen to, be used for showing.
The present invention detects by System on Chip/SoC and selects whether the function of USB interface is the MHL function; If, then export the MHL control signal, control signal switching gate MHL function passage also sends the MHL signal to the MHL chip; The MHL chip is sent to System on Chip/SoC after the MHL signal that receives is converted to the HDMI signal; System on Chip/SoC receives and processes the method for HDMI signal, makes the generic USB interface of video play device can compatible MHL function, has improved the video play device performance, has promoted user's experience, has reached the beneficial effect that has reduced customer using cost.
Description of drawings
Fig. 1 is the implementation method one embodiment schematic flow sheet that mobile high definition of the present invention connects;
Fig. 2 is the video play device user interface schematic diagram that mobile high definition of the present invention connects;
Fig. 3 is the implementation method circuit block diagram that mobile high definition of the present invention connects;
Fig. 4 is the video play device one example structure schematic diagram that mobile high definition of the present invention connects.
The realization of the object of the invention, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Further specify technical scheme of the present invention below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The implementation method one embodiment schematic flow sheet that mobile high definition of the present invention connects with reference to Fig. 1 Fig. 1; As shown in Figure 1, the implementation method of mobile high definition connection of the present invention specifically may further comprise the steps:
Step S01, detection remote controller are selected MHL function or the USB function of USB interface; If MHL function, then execution in step S02; If USB function, then execution in step S03;
One of important inventive point of the present invention is the generic USB interface compatibility MHL function of video play device; Therefore, with after outside mobile device is connected, what the System on Chip/SoC in the video play device need to detect at first that remote controller selects is which function of USB interface, is common USB function or MHL function by the common USB interface of video play device.Namely when outside mobile device was connected with video play device, video play device can eject a prompting frame, showed USB function menu and MHL function menu in the prompting frame, and the user can select USB function or MHL function by remote controller.With reference to Fig. 2, Fig. 2 is the video play device user interface schematic diagram that mobile high definition of the present invention connects; As shown in Figure 2, externally in mobile device and the process that the user is connected, the user also can select USB in this interface or MHL to control the USB interface that video play device is connected with external equipment by remote controller and select USB function or MHL function.The present invention is not limited to the function that uses a teleswitch to select USB interface, also can select with other selection tools.
With reference to Fig. 3, Fig. 3 is the implementation method circuit block diagram that mobile high definition of the present invention connects; As shown in Figure 3, System on Chip/SoC SOC(System on Chip) function of detection remote controller selection USB interface is MHL function or USB function, and according to testing result output control signal, export described control signal to signaling switch Signal input switch by the OUTPUT pin; In a preferred embodiment, the control signal of regulation System on Chip/SoC SOC output is high level when being the MHL control signal, gating MHL function passage; The control signal of output is low level when being the USB control signal, gating USB function passage.
Step S02, control gating MHL function passage carry out the MHL function treatment.
User interface as shown in Figure 2, when user selection MHL, System on Chip/SoC receives orders, MHL control signal by a high level of OUTPUT pin output, be used for control signal switches Si gnal input switch gating MHL function passage, to transfer to the MHL chip by the input signal of USB interface input, the MHL chip is converted to the signal of HDMI form with this input signal, and exports System on Chip/SoC to; System on Chip/SoC is converted to LVDS(Low Voltage Differential Signaling with the signal of this HDMI form, low-voltage differential signal), export display screen to, be used for showing, realize that mobile device and video play device are by the purpose of common USB interface realization MHL function.
Step S03, control gating USB function passage carry out common USB function treatment.
User interface as shown in Figure 2, when user selection USB, System on Chip/SoC receives orders, by low level USB control signal of OUTPUT pin output, be used for the common USB function passage of control signal switches Si gnal input switch gating, and with the formatted output System on Chip/SoC of the input signal by the USB interface input with usb signal; At this moment, System on Chip/SoC will be converted to the LVDS signal by this usb signal, and exports this LVDS signal to display screen for showing, realizes common USB function.
System on Chip/SoC detects remote controller and selects whether the function of USB interface is the MHL function in the present embodiment, if, then export the MHL control signal, control signal switching gate MHL function passage also sends the MHL signal to the MHL chip; The MHL chip is sent to System on Chip/SoC after the MHL signal that receives is converted to the HDMI signal; System on Chip/SoC receives and processes the HDMI signal, and like this, MHL function that the generic USB interface of video play device is just compatible has improved the video play device performance, has promoted user's experience, has reduced customer using cost.
With reference to Fig. 4, Fig. 4 is video play device one example structure schematic diagram of the present invention.As shown in Figure 4, video play device of the present invention comprises: System on Chip/SoC 01, signaling switch 02, MHL chip 03, USB interface 04.
System on Chip/SoC 01 is used for when the function that detects remote controller selection USB interface is the MHL function, and output MHL control signal is controlled described signaling switch gating MHL function passage and sent the MHL signal; Also be used for, receive and process and process the HDMI signal that returns behind the described MHL signal through described MHL chip;
The selection that USB interface 04 is used for according to remote controller, the function of selecting USB interface is MHL function or USB function.
In a preferred embodiment, described System on Chip/SoC 01 also is used for: when the function that detects remote controller selection USB interface was the USB function, output USB control signal was controlled described signaling switch 02 gating USB function passage and is sent usb signal; Also be used for, receive and process described usb signal;
Described signaling switch 02 also is used for: according to the described USB control signal of described System on Chip/SoC output, gating USB function passage also sends usb signal to described System on Chip/SoC.
In conjunction with Fig. 2 and Fig. 3, in the video play device of the present invention since generic USB interface 04 compatibility of video play device the MHL function; Therefore, with after outside mobile device is connected, what the System on Chip/SoC 01 in the video play device need to detect at first that the user uses is which function of USB interface, is common USB function or MHL function by the common USB interface 04 of video play device.When System on Chip/SoC 01 is the MHL function in the function that detects remote controller selection USB interface, exports control signal according to testing result, and export described control signal to signaling switch 02 by the OUTPUT pin; In a preferred embodiment, the control signal of regulation System on Chip/SoC 01 output is high level when being the MHL control signal, gating MHL function passage; The control signal of output is low level when being the USB control signal, gating USB function passage.
User interface as shown in Figure 2, when user selection MHL, System on Chip/SoC 01 receives orders, MHL control signal by a high level of OUTPUT pin output, be used for control signal switch 02 gating MHL function passage, to transfer to MHL chip 03 by the input signal of USB interface 04 input, MHL chip 03 is converted to the signal of HDMI form with this input signal, and exports System on Chip/SoC 01 to; System on Chip/SoC 01 is converted to the signal of this HDMI form LVDS and exports display screen to, is used for showing, realizes that mobile device and video play device are by the purpose of common USB interface 04 realization MHL function.
User interface as shown in Figure 2, when the user uses selection USB, System on Chip/SoC 01 receives orders, by low level USB control signal of OUTPUT pin output, be used for the common USB function passage of control signal switch 02 gating, and the input signal that will input by USB interface 04 is with the formatted output System on Chip/SoC 01 of usb signal; At this moment, System on Chip/SoC 01 will be converted to the LVDS signal by this usb signal, and exports this LVDS signal to display screen, is used for showing, realizes common USB function.
Present embodiment detects remote controller by System on Chip/SoC and selects whether the function of USB interface is the MHL function, if, then export the MHL control signal, control signal switching gate MHL function passage also sends the MHL signal to the MHL chip; The MHL chip is sent to System on Chip/SoC after the MHL signal that receives is converted to the HDMI signal; System on Chip/SoC receives and processes the HDMI signal, and like this, MHL function that the generic USB interface of video play device is just compatible has improved the video play device performance, has promoted user's experience, has reduced customer using cost.
The above only is the preferred embodiments of the present invention; be not so limit its claim; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. a video play device is characterized in that, comprising: System on Chip/SoC, and signaling switch, MHL chip and USB interface, wherein,
Described USB interface is for MHL function or the USB function of selecting USB interface;
Described System on Chip/SoC, be used for detect selection be the MHL function of USB interface the time, output MHL control signal is controlled described signaling switch gating MHL function passage and is sent the MHL signal; Also be used for, receive and process and process the HDMI signal that returns behind the described MHL signal through the MHL chip;
Described MHL chip is used for receiving the described MHL signal that described signaling switch sends, described MHL signal is converted to described HDMI signal after, be sent to described System on Chip/SoC;
Signaling switch is used for the described MHL control signal according to described System on Chip/SoC output, gating MHL function passage, and send described MHL signal to described MHL chip.
2. video play device as claimed in claim 1 is characterized in that,
Described System on Chip/SoC also is used for: detect selection be the USB function of USB interface the time, output USB control signal is controlled described signaling switch gating USB function passage and is sent usb signal; Also be used for, receive and process described usb signal;
Described signaling switch also is used for: according to the described USB control signal of described System on Chip/SoC output, gating USB function passage also sends usb signal to described System on Chip/SoC.
3. video play device as claimed in claim 1 is characterized in that, described System on Chip/SoC be used for to receive and processes to be processed the HDMI signal that returns behind the described MHL signal through described MHL chip and specifically comprise:
Described System on Chip/SoC is used for, and receives described HDMI signal, described HDMI signal is converted to Low Voltage Differential Signal LVDS signal after, export display screen to and be used for to show.
4. video play device as claimed in claim 2 is characterized in that, described System on Chip/SoC is used for receiving and processing described usb signal specifically comprising:
Described System on Chip/SoC is used for, and receives described usb signal, described usb signal is converted to the LVDS signal after, export display screen to and be used for to show.
5. the implementation method that mobile high definition connects is characterized in that, may further comprise the steps:
What step S01, detection were selected is MHL function or the USB function of USB interface;
If what step S02 selected is the MHL function, then control gating MHL function passage, carry out the MHL function treatment.
6. method as claimed in claim 5 is characterized in that, described step S02 specifically comprises:
Output MHL control signal, control signal switching gate MHL function passage also sends the MHL signal;
After receiving described MHL signal and described MHL signal being converted to the HDMI signal described HDMI signal is processed.
7. method as claimed in claim 6 is characterized in that, described described HDMI signal is processed comprises:
After described HDMI signal is converted to the LVDS signal, export display screen to, be used for showing.
8. method as claimed in claim 5 is characterized in that, also comprises:
If what step S03 selected is the USB function, then controls gating USB function passage and carry out common USB function treatment.
9. method as claimed in claim 8 is characterized in that, described step S03 specifically comprises:
Output USB control signal, control signal switching gate USB function passage also sends usb signal;
Receive described usb signal and described usb signal is processed.
10. method as claimed in claim 9 is characterized in that, described System on Chip/SoC receives and processes described usb signal and comprises:
After described usb signal is converted to the LVDS signal, export display screen to, be used for showing.
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