TWI516124B - Displaying method of screen display information - Google Patents

Description

Display method of screen display information

The invention relates to the technical field of image data transmission, and in particular to a display method for displaying information on a screen.

According to the current Motion Estimation and Motion Compensation (MEMC) technology, it is impossible to know whether the received image contains an On-Screen Display (OSD), but must be converged by the transmitter via I2C. The row transfer interface tells the position of the motion estimation/motion compensation chip OSD in a coordinate form, and the motion estimation/motion compensation chip can thereby protect the OSD from being destroyed by the motion estimation/motion compensation process, but the current technology The disadvantages are:

1. The current technology can only be protected by blocks and cannot be protected by pixel level. The OSD can only be a simple graphic composed of rectangles and cannot be circular or irregular shapes (such as rounded quads), otherwise it will be because Unable to know the exact location of the OSD and there is no way to fully protect the OSD during motion estimation/motion compensation processing;

2. The current technology is to know the location of the OSD through a different transmission interface than the Low Voltage Differential Signaling (LVDS) transmission interface. Different transmission interfaces have different clocks and cause a time difference. OSD is unable to move, slide, scroll or quickly transform shapes;

3. After two-dimensional (2D) to three-dimensional (3D) image processing, the OSD may be deformed without being within the predetermined protection range;

4. The stereo OSD cannot be completely protected in the Frame Sequential Mode because the location of the OSD in each frame is not the same;

5. The stereoscopic OSD cannot be completely protected when the 3D Depth is changed.

One of the objects of the present invention is to provide a display method for displaying information on a screen to overcome the technical deficiencies existing in the prior art.

A display method for displaying information on a screen according to an embodiment of the present invention includes the following steps: generating display data and control information; and transmitting display data to a display device through a transmission interface according to a transmission protocol, and transmitting control information through the transmission interface Transmitting to the display device; and causing the display device to display an image containing the specific display content according to the control information.

In an embodiment of the invention, the transmission interface is, for example, a low voltage differential signal transmission interface. The above control information may be embedded in a reserved bit in the transmission protocol for transmission with the display content using the above-mentioned transmission interface; or, the control information described above replaces some color bits in the transmission protocol. (Color Bit) is transmitted using the above-mentioned transmission interface with the display content.

In the embodiment of the present invention, the above control information may be used to define a display position, a display mode, left and right eye map information, or a 3D depth of a specific display content.

In the embodiment of the present invention, the specific display content and the image content other than the specific display content in the image are respectively located in different layers of the image. For example, a particular display content is located at the top of the image.

In an embodiment of the present invention, the display method may further include the step of: using a communication interface to communicate control information definition; wherein the communication interface is an I2C bus, a serial peripheral interface (SPI), or a general-purpose input/output interface (GPIO). and many more.

In an embodiment of the present invention, the step of causing the display device to display the image including the specific display content according to the control information includes: acquiring an unused bit in the transmission protocol when transmitting each pixel data in the display material by using the transmission interface (for example, Information in the reserved bits, control bits, and/or partial color bits; determining whether the displayed material contains a particular display based on information in the unused bits; and if the displayed material contains a particular display, it will not be used The information within the bit is used as control information to determine the display properties of the particular display content.

In summary, the control information of the display attribute used to define the display position, the display mode, the left and right eye map information, or the stereoscopic depth of the specific display content is transmitted by using the same transmission interface as the display content, and the control information can be Reserved bits or other unused bits embedded in the transport protocol, enabling pixel-level identification of specific display content; therefore, specific display content such as the screen setting menu, regardless of its position, shape, etc., Can be completely protected without being destroyed.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Please refer to FIG. 1 , which illustrates a system architecture suitable for performing a display method of screen display information according to an embodiment of the present invention. As shown in FIG. 1 , the LVDS transmitting end 100 receives the externally input image data to the data processor 102 for performing, for example, Scaling, Picture Quality (PQ) processing, etc., to generate control information and display data, and The display data and control information are transmitted to the LVDS transmitter 106, which is then sent by the LVDS transmitter 106 to the LVDS receiver 120 via the LVDS transmission interface in accordance with the LVDS transmission protocol. Here, the display data generated by the data processor 102 may include specific display content defined by the control information such as an OSD, an index of left and right eye images, a multi-view image index, a sub-picture sub-picture, a logo, or a subtitle. Etc., and the control information can define display attributes such as display position, display mode (eg, picture, etc.), left and right eye information, or stereo depth of a specific display content.

In the above, the LVDS receiver 126 in the LVDS receiving end 120 receives the display data and control information from the LVDS transmitting end 100 through the LVDS transmission interface, and then transmits the data to the data processor 122 for processing, for example, acquiring control information and displaying data in the control. The specific display content defined by the information and the image content of the display material other than the specific display content. Here, due to the identification function of the control information, the material processor 122 can perform differentiating processing on the specific display content and the video content other than the specific display content, for example, when the specific display content is the OSD, the sub-picture of the child picture, the trademark When the subtitles and the like are different from the display content of the image content, the display blocks may not be interfered with the image content to generate an artifact (Artifact) after being processed by the data processor 122. Or the data processor 122 knows from the identification of the control information that the frame is a left eye map or a right eye map or a plurality of views, and can also be used to learn the depth information of the frame.

Referring to FIG. 2, a data stream using an LVDS transmission protocol according to an embodiment of the present invention is illustrated. In Figure 2, RXCLKP and RXCLKN are clock signals, RXINO0 P/N~RXINO4 P/N represents the pixel data of the odd channel group output, and RXINE0 P/N~RXINE4 P/N represents the pixel data of the even channel group output. In the current cycle, all the bits except the control bits DE, Vsync, and Hsync and the reserved bits Aux1~Aux7 are color bits, and the RGB data of a single pixel is represented by a 10-bit color bit; Furthermore, FIG. 2 shows RGB data including two pixels in the current period, but the present invention can also output RGB data of pixels using only odd channel groups or even channel groups, thereby including only one pixel in a single cycle. RGB data.

More specifically, as shown in the following Table 1, the present embodiment utilizes different combinations of values in the reserved bits Aux1~Aux7 to represent different control information, for example, 0000000 is used to identify the general state in which the display material does not contain the specific display content. , 0000001 is used to identify that the specific display content included in the display material is OSD, 0000010 is used to identify that the display material is a picture, and the specific display content included therein is, for example, a sub-picture, and 0000011 is used to identify that the specific display content included in the display material is The trademark 0000100 is used to identify that the specific display content included in the display material is a subtitle, 0100000 is used to identify that the specific display content included in the display material is a left picture, and 0100001 is used to identify that the specific display content included in the display material is a right picture, and 01XXXXX is used for identification. The specific display content included in the display material is the Xth picture of the multi-view, and 1XXXXXX is used to identify the stereo depth of the displayed material.

In addition, in the embodiment of the present invention, it is not limited to using only reserved bits to represent control information, and it is also possible to use unused control bits Vsync and Hsync, or to sacrifice color bits (for example, only 8-bit color) Bits or 6-bit color bits to represent RGB data) to represent control information. Furthermore, in the embodiment shown in FIGS. 1 and 2, the LVDS transmitting end 100 may be any system that can transmit an LVDS signal, such as a system board or a motion estimation/motion compensation circuit, and the LVDS receiving end. 120 may be any device that can receive LVDS signals, such as motion estimation/motion compensation circuit, or timing controller (TCON); the two can pass through any communication interface such as I2C bus, SPI (Serial Peripheral Interface) or GPIO (General Purpose Input/Output) communicates, so that the LVDS receiving end 120 can know what control information is represented by unused bits (such as reserved bits) in the current LVDS transmission protocol. The LVDS receiving end 120 may also require the LVDS transmitting end 100 to identify different types of pixels on the unused bits in the LVDS transmission protocol; in other words, the LVDS transmitting end 100 and the LVDS receiving end 120 can communicate control information through the communication interface. Definition. However, the present invention is not limited thereto. For example, if the LVDS transmitting end 100 and the LVDS receiving end 120 have a protocol, the communication interface may not be used.

The embodiment of the LVDS transmitting end 100 and the LVDS receiving end 120 respectively for the system board and the display device in the television system will be specifically described below with reference to FIG. 3, and the OSD is taken as a specific display content for illustration.

As shown in FIG. 3, the data processor 302 in the system board 300 receives the externally input image data and the OSD data provided by the internal OSD generator 304 and the OSD control information to generate display data and OSD control information, and displays The data and the OSD control information are transmitted to the LVDS transmitter 306. The OSD control information can be embedded in the pixel data corresponding to the OSD data by the data processor 302 to achieve pixel-level control of the OSD. Thereafter, the display data and OSD control information are transmitted by the LVDS transmitter 306 to the display device 320 via the LVDS transmission interface, such as on the motion estimation/motion compensation chip of the display device 320. It can be known here that the OSD data as a specific display content is transmitted using the same transmission interface as the OSD control information.

The LVDS receiver 326 in the display device 320 receives the display data and the OSD control information through the LVDS transmission interface and transmits the data to the data processor 322 for subsequent processing. After receiving the display data and the OSD control information, the data processor 322 knows whether the current pixel data is used to represent the pixel data of the OSD according to unused bits (for example, reserved bits), and then performs corresponding processing. . Specifically, for pixel data that is not used to render the OSD, the data processor 322 performs general motion estimation/motion compensation processing, and the pixel data used to render the OSD is specially protected from it. It is affected by motion estimation/motion compensation processing; and since this control information is pixel level and transmitted with pixel data, its accuracy is 100% accurate. Finally, the image data output by the data processor 322 is finally displayed on the screen of the display device 320, and the OSD is displayed on the uppermost layer of the screen of the display device 320 instead of a part of the image in the corresponding position in the simultaneously displayed image data. .

It is worth mentioning that the embodiment of the present invention can highlight the advantages of the stereo image, because the stereo image is easy to have different OSDs due to the change of time, and the protection of the OSD becomes complicated. The current motion estimation/motion compensation technology cannot effectively protect the OSD in the stereo image; while the OSD control information in the embodiment of the present invention is transmitted along with the pixel data, the motion estimation/motion compensation chip can be clearly known. The deformed OSD effectively protects it.

In summary, the embodiment of the present invention uses a control information system for defining display attributes such as a display position, a display mode (for example, a picture of a child, etc.), left and right eye map information, or a stereoscopic depth of a specific display content, and a specific display content. Using the same transmission interface for transmission, control information can be embedded in reserved bits or other unused bits in the transmission protocol, thereby enabling pixel-level identification of specific display content; thus displaying content such as a screen setting menu, No matter how its position, shape, etc. change, it can be completely protected without being destroyed.

While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

100. . . LVDS sender

102, 122. . . Data processor

106. . . LVDS transmitter

120. . . LVDS receiver

126. . . LVDS receiver

300. . . System board

302, 322. . . Data processor

304. . . OSD generator

306. . . LVDS transmitter

320. . . Display device

326. . . LVDS receiver

FIG. 1 illustrates a system architecture suitable for performing a display method of screen display information proposed by an embodiment of the present invention.

2 illustrates a data stream using an LVDS transmission protocol in accordance with an embodiment of the present invention.

FIG. 3 illustrates an embodiment of the LVDS transmitting end and the LVDS receiving end of FIG. 1 being a system board and a display device in a television system, respectively.

100. . . LVDS sender

102. . . Data processor

106. . . LVDS transmitter

120. . . LVDS receiver

122. . . Data processor

126. . . LVDS receiver

Claims (8)

A display method for displaying information on a screen includes: generating a display data and a control information; transmitting the display data to a display device via a transmission interface according to a transmission protocol, and transmitting the control information through the transmission interface And displaying on the display device; and causing the display device to display an image including a specific display content according to the control information; wherein the control information defines a display position, a display manner, left and right eye map information or a stereoscopic depth of the specific display content; The specific display content and the image content other than the specific display content in the image are respectively located in different layers of the image. The display method of claim 1, wherein the transmission interface is a low voltage differential signal transmission interface. The display method of claim 2, wherein the control information is embedded in a reserved bit in the transmission protocol to transmit with the display material using the transmission interface. The display method of claim 2, wherein the control information replaces a portion of the color bits in the transmission protocol for transmission with the display material using the transmission interface. The display method according to claim 1, wherein the specific display The content is located at the top of the image. The display method according to claim 1, further comprising the step of: communicating the definition of the control information by using a communication interface. The display method of claim 6, wherein the communication interface is an I2C bus, a sequence peripheral interface, or a general-purpose input/output interface. The display method of claim 1, wherein the step of causing the display device to display the image including the specific display content according to the control information comprises: acquiring, by using the transmission interface, each pixel data in the display data The information in the bit element is not used in the transmission protocol; determining whether the display material includes the specific display content according to the information in the unused bit element; and if the display material includes the specific display content, the unused bit element is used The information inside is used as the control information to determine the display attribute of the specific display content.