WO2012068810A1

WO2012068810A1 - Method and apparatus for converting display signals

Info

Publication number: WO2012068810A1
Application number: PCT/CN2011/072170
Authority: WO
Inventors: 袁雪
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-11-25
Filing date: 2011-03-25
Publication date: 2012-05-31
Also published as: CN102097078A; CN102097078B

Abstract

A method and an apparatus for converting display signals are provided by the present invention. The method includes: converting the content to be displayed, inputted by a user, into a first display signal; detecting the related information of the first display signal, obtaining the detection result of the first display signal; identifying the related information of a second display signal to be displayed, obtaining the identification result of the second display signal; comparing the detection result with the identification result, and when the detection result doesn't match with the identification result, converting the first display signal to obtain the second display signal and outputting it. The present invention enables the conversion from the display signal of a mobile terminal to the display signal of a large-screen device.

Description

Method and device for converting display signal

The present invention relates to signal conversion techniques, and more particularly to a method and apparatus for converting display signals. Background technique

In today's technology era, mobile terminals, especially mobile phones, play a very important role in people's lives. With the development of smart mobile terminals, people are no longer limited to the use of their communication functions, but more use it to access the network, run applications and so on. At this time, the bottleneck of the mobile terminal, especially the mobile phone: The display screen is small and highlighted. But in fact, there are many devices with large screens in home appliances, such as televisions, computer monitors, and so on. How to convert the display content of the small screen mobile terminal to the display of the large screen device is an urgent problem to be solved, which is related to the display interface.

Large-screen devices, such as televisions and computers, have come to the present with various display interfaces, such as the display interface of TV sets from the earliest most common wired TV (RF) input interfaces, AV interfaces, S-terminals, color-difference components, VGA interface, DVI interface, 1394 interface, etc., has now developed the most advanced HDMI digital HD interface. The display of the computer has a DVI interface, a VGA interface, etc., and the display interfaces of mobile terminals, especially mobile phones, generally have: MCU, RGB, MDDI, and the like.

The following describes the relevant interfaces.

TV (RF) input interface: Antenna and analog closed-circuit connection TV (RF, Radio Frequency) interface. As the most common video connection, it can transmit both analog video and audio signals. The imaging principle of the TV input interface is that the video signal and the audio signal are mixed and encoded, and then outputted in a series of separation and decoding processes inside the display device. Due to the need for video and audio hybrid coding, the signals will interfere with each other, so the picture quality of the output is The quantity is the worst of all interfaces.

AV interface: Audio (Video) and Video (Video) interface, also known as RCA. The AV interface is an improved interface for the TV input interface. It is divided into three lines: red and white (composed of left and right channels, audio interface) and yellow line (video interface). The AV interface transmits composite video, usually using a yellow-line (video interface) Lotus connector (RCA, Radio Corporation of American); where, the composite refers to an analog signal that transmits luminance and chrominance in the same channel.

S-Video (S-Video) interface: S-terminal connection uses Y/C (brightness and chrominance) separate output, uses four-core cable to transmit signals, and the interface is a four-pin connector. In the interface, the two pins are grounded, and the other two pins transmit the luminance and chrominance signals respectively. Because the luminance and chrominance signals are transmitted separately, the S-Video output is better than the composite video.

Component component interface: The Component component interface is usually labeled Y/Pb/Pr, and each cable and interface are labeled in red, green, and blue. The green cable (Y) transmits the luminance signal, and the blue and red cables (Pb and Pr) transmit the color difference signal. The color difference component interface works better than the S terminal.

VGA (Video Graphics Array) interface, that is, display graphics array interface, also known as D-Sub. The VGA interface has a total of 15 pins, divided into 3 rows, 5 holes per row, which is the most widely used interface type on the graphics card. Most graphics cards have such interfaces, transmitting red, green and blue analog signals and synchronization signals ( Horizontal and vertical signals).

DVI (Digital Visual Interface) interface, that is, digital video interface. The DVI interface and the VGA interface are the most commonly used interfaces in the computer. Unlike the VGA interface, the DVI interface can transmit digital signals without the need for digital-to-analog conversion, so the picture quality is very high. Currently, DVI interfaces are also available on many HDTVs. It should be noted that the DVI interface has various specifications, and DVI-D (Digital) and DVI-I (Intergrated) are common. The DVI-D can only transmit digital signals and can be used to connect graphics cards to flat-panel TVs; DVI-I can convert between DVI-D and VGA.

IEEE 1394 interface, also known as FireWire or iLink, capable of transmitting digital video and audio and The control signal has a high bandwidth and is very stable. Usually used to connect digital video cameras, DVD recorders and other equipment. There are two types of IEEE 1394 interfaces: a 6-pin hexagonal interface and a 4-pin small quadrilateral interface. The 6-pin hexagonal interface powers the connected device, while the 4-pin quad connector does not.

HDMI (High Definition Multimedia Interface), the high-definition multimedia interface: The HDMI interface is a recently introduced interface that transmits all digital signals as the DVI interface. The difference is that the HDMI interface can not only transmit high-definition digital video signals, but also transmit high-quality audio signals at the same time, and has the same functions as the RF interface; however, since the HDMI interface uses full digital signal transmission, it does not resemble a radio frequency. In the case of an interface, the picture quality is poor.

The MCU (Micro Control Unit) interface, also known as the microcontroller unit interface, is the most commonly used interface mode for mobile terminals (such as mobile phones). It is generally 80 systems (68 systems no longer exist). The data bit transmission of the MCU interface is divided into 8 bits, 9 bits, 16 bits and 18 bits; the connection is divided into: CS/, RS (register selection), RD/, WR/, and data lines. The advantages are: Control is simple and convenient, no clock and sync signals are needed. The disadvantage is: It takes a lot of memory, which makes it difficult for the mobile terminal to reach the large screen QVGA (Quad VGA (Video Graphics Array)), VGA size 1/4 or more.

RGB (Red Green Blue) interface: The three primary colors of color, red, green and blue, use the additive color method, which is a mode for large-screen devices. The data bit transmission also has 6 bits, 16 bits and 18 bits. Connections generally include: vertical sync signal, horizontal sync signal, clock signal, enable signal, and data line. The advantages and disadvantages of the RGB interface are the opposite of the MCU interface.

The MDDI (Mobile Display Digital Interface) interface, the mobile high-speed serial interface, is an interface proposed by Qualcomm in 2004. It can improve the reliability of mobile phones and reduce power consumption by reducing the connection. It will replace the high-speed synchronous serial port. (SPI, Serial Peripheral interface) mode becomes a high-speed serial interface in the mobile domain, and its connection is mainly host_data, host_strobe, Client—data, client—strobe, power, ground (GND, Ground).

As can be seen from the above interface description, it is not possible to directly connect the display interface of the mobile terminal to the large-screen device, and the display content of the mobile terminal cannot be converted to the display of the large-screen device. Summary of the invention

In view of the above, it is a primary object of the present invention to provide a display signal conversion method and system capable of converting a display signal of a mobile terminal into a display signal of a large screen device.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention provides a display signal conversion apparatus, including: a work unit; the work unit includes: a processor, an input detection module, an interface, an output identification module, a comparison discrimination module, and a synthesizer;

The processor is configured to convert content that needs to be displayed by the user into a first display signal; the input detection module is connected to the processor, receives the first display signal, and displays the first display The related information of the signal is detected, and after the detection result of the first display signal is obtained, the first display signal and the detection result are output;

The interface is configured to output a second display signal and store related information of the second display signal;

The output identification module is connected to the interface, and configured to identify related information of the second display signal, obtain a recognition result of the second display signal, and output the result;

The comparison discriminating module is respectively connected to the input detecting module and the output identifying module, and receives the detection result and the recognition result, and performs comparison; when the detection result does not match the identification result, the received result is received. The first display signal is output to the synthesizer;

The synthesizer is connected to the comparison discriminating module and the interface, and configured to receive the first display signal output by the comparison discriminating module, and perform conversion to obtain a second display signal and output the signal to the interface. Further, the working unit further includes: a human-computer interaction module, connected to the processor, configured to input, by the user, the content that needs to be displayed.

Further, the working unit further includes: a memory, which is respectively connected to the processor and the synthesizer;

The processor is further configured to input, to the memory, a program for running when the content to be displayed is converted into the first display signal, a first display signal, and an intermediate calculation value generated during the conversion;

The synthesizer is further configured to input an intermediate calculated value generated when the first display signal is converted into the second display signal and the converted second display signal is input to the memory for saving.

Further, the related information of the first display signal or the second display signal includes: one or more of interface format, number of bits, resolution, brightness, saturation, contrast, and hue.

Further, the comparison discriminating module is further connected to the interface, and when the detection result is matched with the identification result, the comparison discriminating module is further configured to directly output the received first display signal to the interface;

The interface is further configured to output the first display signal.

Further, the device further includes a power source and a clock connected to the working unit; the power source is configured to supply power to the working unit;

The clock is used to provide the working unit with a reference frequency when working.

The invention also provides a method for converting a display signal, comprising:

Converting the content input by the user to be displayed into the first display signal;

Detecting related information of the first display signal to obtain a detection result of the first display signal; identifying relevant information of the second display signal that needs to be output, to obtain a recognition result of the second display signal;

Comparing the detection result with the recognition result, and when the detection result does not match the recognition result, converting the first display signal to obtain a second display signal and then transmitting Out.

Further, the method further includes:

The program to be displayed when the content to be displayed is converted into the first display signal, the first display signal, and the intermediate calculated value generated during the conversion are saved;

The intermediate calculated value generated when the first display signal is converted into the second display signal and the second display signal obtained after the conversion are saved.

Further, when the detection result matches the recognition result, the method further includes: directly outputting the first display signal.

The present invention displays a signal conversion scheme, converting a content input by a user to be displayed into a first display signal; detecting related information of the first display signal to obtain a detection result of the first display signal; and identifying a second display that needs to be output Correlating information of the signal, obtaining a recognition result of the second display signal; comparing the detection result with the recognition result, and when the detection result does not match the recognition result, converting the first display signal to obtain a second display signal, and outputting; Therefore, when the first display signal is a signal suitable for the mobile terminal and the second display signal is a signal suitable for the large-screen device, the present invention can realize the conversion of the display signal of the mobile terminal into the display signal of the large-screen device, and solves the movement. A small bottleneck on the terminal screen improves the user experience. DRAWINGS

1 is a schematic structural view of a display signal conversion device according to the present invention;

2 is a schematic flow chart of a method for converting a display signal according to the present invention. detailed description

The technical solutions of the present invention are further elaborated below in conjunction with the accompanying drawings and specific embodiments. The mobile terminal is connected to the large screen device, and is provided by the display signal conversion device provided by the present invention. A display signal for converting a display signal of the mobile terminal into a large screen device is realized.

Of course, the display signal conversion device provided by the present invention can also be used to implement a display signal for converting a display signal of a large screen device into a mobile terminal.

1 is a display signal conversion device of the present invention, which can convert a display signal of a mobile terminal into a display signal of a large-screen device when the device is applied to a mobile terminal; when the device is applied to a large-screen device, the large-screen device can be The display signal of the device is converted into a display signal of the mobile terminal.

As shown in FIG. 1, the conversion device includes: a working unit 10, a power source 20, and a clock 30; the power source 20 is used to supply power to the entire working unit 10, and implements functions such as charging management; and the clock 30 is used to provide the working unit 10 during operation. Reference frequency.

The work unit 10 includes: a human-machine interaction module 11, a processor 12, a memory 13, an input detection module 14, a comparison determination module 15, an output identification module 16, an interface 17, and a synthesizer 18;

The human-computer interaction module 11 (such as a keyboard, a mouse, a sensor, etc.) is connected to the human-machine interface of the processor 12 for implementing human-computer interaction. The user inputs the content to be displayed through the human-computer interaction module 11; the user can also preview the content to be displayed through the human-machine interaction module 11. The human-machine interaction module 11 can also be connected to the processor 12 wirelessly (e.g., sensor, human eye rotation recognition, etc.).

The processor 12 receives the content that needs to be displayed through its own human-machine interface, and converts it into a signal that needs to be displayed. The present invention is referred to as a first display signal; the processor 12 also passes through its own display interface and the input detection module 14 The data interface is connected, the first display signal is provided to the input detection module 14;

Further, the processor 12 is connected to the memory 13 through its own data interface, and inputs the running program, the first display signal and the intermediate calculation value to the memory 13 for saving. When an error occurs during the conversion of the display signal, it is necessary to re-convert. The processor 12 can directly perform the conversion processing of the display signal by calling the above-described stored content directly from the memory 13. The following is an example of the above-mentioned running program for generating the first display signal, and the generated intermediate calculated value, for example: The processor works by running the program, and the main program needs a relatively large storage space, so it is generally placed in the memory. In the main program, the main program always exists, but only when it is needed. For example, if the user presses "Γ" on the button, the processor will run the program to recognize: the program will respond to the user's operation and scan through the button to recognize that the user is pressing "1". Then judge according to the current interface. What information needs to be displayed, assuming that the user presses "Γ" in the standby interface, then the processor determines that the display needs to be displayed under the dialing interface. "On this basis, the processor will call the dialing interface layer and The layer of the number "1" (the interface layer is stored in the memory in digital form instead of the image), and the two are superimposed by calculation to generate the data of the image of "1" under the dialing interface. Sending the data to the display interface to obtain the first display signal. The process from pressing "1" on the button to obtaining the first display signal is implemented by running the program, and the running program is performed by the processor. Calculate, except for the first display signal, the calculated data is the intermediate calculation value. The above mentioned button scan, judge the interface to be displayed, and superimpose the layer to generate the image. The data is intermediate.

The input detection module 14 is connected to the display interface of the processor 12 through the data interface, receives the first display signal, and detects related information of the first display signal, including the following parameters: interface format, number of bits, resolution, brightness, saturation Degree, contrast and hue, etc. among them,

The so-called interface format refers to: the interface format to which the display signal is applicable, such as RGB interface, VGA interface MDDI interface, etc.;

The so-called digits refer to: The data bits of the interface, for example, the data bit transmission of the MCU interface has 8 bits, 9 bits, 16 bits and 18 bits; the data bit transmission of the RGB interface has 6 bits, 16 bits and 18 bits. and many more;

The resolution (pixel X pixel) refers to: The precision of the screen image refers to the number of pixels that the display can display. Since the dots, lines and faces on the screen are all composed of pixels, the more pixels the display can display, the finer the picture, and the more information that can be displayed in the same screen area. many. Think of the entire image as a large board, and resolution is the number of intersections of all warp and weft. Generally, the resolutions seen are expressed in multiplication, such as 1024*768, where "1024" represents the number of dots displayed horizontally on the screen, and "768" represents the number of dots in the vertical direction.

The term "brightness" means: a physical quantity indicating a person's actual feeling of illuminating or reflected light intensity on the surface of the illuminant or the object to be illuminated.

The so-called saturation refers to: the degree of vividness of color, also known as the purity of color. The degree of saturation depends on the ratio of the color component to the achromatic component (gray) in the color. The larger the color component, the greater the saturation; the larger the achromatic component, the smaller the saturation.

The so-called contrast refers to: The difference between the brightest white and the darkest black in the dark and dark areas of an image. The greater the difference in the range, the larger the difference is, the smaller the difference is, the smaller the contrast is.

The so-called hue refers to: The overall tendency of the color of a picture in a painting is a large color effect. On objects of different colors, a certain color is enveloped, so that objects of different colors have the same color tendency. Such a color phenomenon is a color tone.

Then, the input detecting module 14 outputs the detection result of the first display signal (including the detection result of one or more of the above parameters) and the first display signal to the comparison discrimination module 15.

The interface 17 is configured to connect the mobile terminal and the large-screen device, and output the second display signal or the first display signal to the target device. The target device may be a mobile terminal or a large-screen device, depending on the application scenario. When the target device is a large screen device, the source device is a mobile terminal; when the target device is a mobile terminal, the source device is a large screen device. In addition, the interface also stores associated information of the second display signal output therefrom for identification by the output identification module 16.

The output identification module 16 is connected to the interface 17 to identify related information of the second display signal, such as interface format, number of bits, resolution, brightness, saturation, contrast, and hue, and the recognition result of the second display signal (including the recognition result of one or several of the above parameters) output to The discrimination module 15 is compared.

The comparison discriminating module 15 is connected to the input detecting module 14 and the output identifying module 16, respectively, and compares between the detection result of the first display signal and the recognition result of the second display signal to determine whether the first display signal needs to be converted, mainly It is judged whether the two match, if the matching description does not need to be converted, the first display signal is directly output to the interface 17 and sent to the target device for display; if it does not match, the conversion is required, and the first display signal is output to Synthesizer 18;

The synthesizer 18 is connected to the comparison discriminating module 15, receives the first display signal to be converted, and obtains a second display signal after performing the conversion operation, and outputs the signal to the interface 17, for transmission to the target device for display. The conversion operation, such as amplification, horizontal or vertical position adjustment, format conversion, etc.; further, the synthesizer is further connected to the memory 13, the intermediate calculation value generated when the first display signal is converted, and the converted The second display signal is input to the memory 13 for storage.

It should be noted that the memory 13 is allocated in advance by the processor 12 when the display signal starts to be converted; after the conversion of the current display signal is successful, the memory 13 can be released.

Based on the display signal conversion device described above, the method for converting the display signal of the present invention is as shown in FIG. 2, and includes:

Step 201: Convert the content that needs to be displayed by the user into the first display signal. Step 202: Detect the related information of the first display signal, and obtain the detection result of the first display signal, including the interface format, the number of bits, and the resolution. One or more of brightness, saturation, contrast, and hue;

Step 203: Identify relevant information of the second display signal that needs to be output, and obtain a recognition result of the second display signal, including one or more of an interface format, a bit number, a resolution, a brightness, a saturation, a contrast, and a hue;

Steps 204 to 205, comparing the detection result of the first display signal with the recognition result of the second display signal, determining whether the two match, and if yes, directly outputting the first display signal; If it does not match, go to step 206;

Step 206: Convert the first display signal into a second display signal and output.

The solution of the present invention will be described below by way of specific embodiments in conjunction with the above display signal conversion apparatus and method.

The scenario of this embodiment is: The display signal of the mobile terminal needs to be converted into a display signal of the large screen device, then the mobile terminal is the source device, and the large screen device is the target device.

In this embodiment, the apparatus provided by the present invention is applied to a mobile terminal, and the conversion of the display signal is as follows:

1. The user inputs the content to be displayed through the human-computer interaction module 11 , and after receiving the content to be displayed, the processor 12 converts the content into a first display signal;

Further, the processor 12 inputs the running program, the first display signal and the intermediate calculated value into the storage space allocated in advance, that is, the memory 13 for saving;

2. The input detection module 14 detects the first display signal to obtain a detection result of the first display signal, including one or more of an interface format, a number of bits, a resolution, a brightness, a saturation, a contrast, and a hue; for example The interface format is RGB interface, the resolution is 320x620, etc.

3. The output identification module 16 identifies the second display signal that can be output from the interface 17, and obtains a recognition result of the second display signal, including one of an interface format, a number of bits, a resolution, a brightness, a saturation, a contrast, and a hue. Kind or several; for example, the interface format is CVBS interface, the resolution is 1024x768, etc.;

4. The comparison determining module 15 compares the detection result of the first display signal with the recognition result of the second display signal to determine whether the two match, and by comparison, the two do not match and need to be converted; then the comparison determining module 15 The first display signal is output to the synthesizer 18.

5. The synthesizer 18 converts the first display signal into the second display signal: the synthesizer 18 performs conversion calculation, for example, converting the interface format from the RGB interface to the CVBS interface, converting the resolution from 320x620 to 1024x768, and obtaining the first after the conversion succeeds. Two display signals. Synthesizer 18 will be The second display signal is output to the interface 17, which is output by the interface 17 to the target device, that is, the large screen device.

The above conversion calculation can adopt the signal conversion technology in the prior art, and details are not described herein.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A device for converting a display signal, comprising: a working unit; the working unit comprising: a processor, an input detecting module, an interface, an output identifying module, a comparison discriminating module, and a synthesizer; wherein

The synthesizer is connected to the comparison discriminating module and the interface, and configured to receive the first display signal output by the comparison discriminating module, and perform conversion to obtain a second display signal and output the signal to the interface.

The apparatus for converting a display signal according to claim 1, wherein the working unit further comprises: a human-machine interaction module, connected to the processor, for inputting the content to be displayed by the user.

The apparatus for converting a display signal according to claim 1, wherein the working unit further comprises: a memory respectively connected to the processor and the synthesizer;

The processor is further configured to input, to the memory, a program for running when the content to be displayed is converted into the first display signal, a first display signal, and an intermediate calculation value generated during the conversion. Save

The apparatus for converting a display signal according to claim 1, wherein the information related to the first display signal or the second display signal comprises: interface format, number of bits, resolution, brightness, saturation, contrast, and One or several of the tones.

5. The apparatus for converting a display signal according to claim 1, wherein:

The comparison discriminating module is further connected to the interface, and when the detection result is matched with the identification result, the comparison discriminating module is further configured to directly output the received first display signal to the interface;

The interface is further configured to output the first display signal.

The apparatus for converting a display signal according to any one of claims 1 to 5, characterized in that the apparatus further comprises a power source and a clock connected to the working unit;

The power source is configured to supply power to the working unit;

7. A method for converting a display signal, comprising:

Comparing the detection result with the recognition result, and when the detection result does not match the identification result, converting the first display signal to obtain a second display signal and outputting the second display signal.

The method for converting a display signal according to claim 7, wherein the method further comprises: Saving the program to be displayed when the content to be displayed is converted into the first display signal, the first display signal, and the intermediate calculation value generated during the conversion;

The method for converting a display signal according to claim 7, wherein the related information of the first display signal or the second display signal comprises: interface format, number of bits, resolution, brightness, saturation, contrast, and One or several of the tones.

10. The apparatus for converting a display signal according to claim 7, wherein when the detection result matches the recognition result, the method further comprises: directly outputting the first display signal.