TWI400937B - Video transforming device and method - Google Patents

Description

Image conversion device and image signal conversion method

The present invention relates to an image conversion device, and more particularly to an image conversion device for converting a 3D image input signal.

The current flat display technology is very mature, and the stereo display technology is regarded as the new generation of display technology. Stereoscopic display technology can basically be distinguished by glasses from the consumer's point of view. Although the hardware technology of wearing glasses-type stereo display has been developed very mature, since special special glasses management is a very complicated problem, it is less suitable for human needs. Conversely, the naked-eye stereo display technology will be the main development driver in the future.

The invention provides an image conversion device, comprising a 3D image receiver, a control unit, a detecting unit and a certain standard unit. The 3D image receiver receives a 3D image input signal for generating a first control signal, a second control signal, a first vertical synchronization signal, and a 3D data stream. The control unit receives the first vertical synchronization signal and determines whether to output the first vertical synchronization signal or a second vertical synchronization signal according to the first control signal. The detecting unit detects the 3D data stream according to the output of the control unit to generate a detection result. The calibration unit processes the detection result according to the second control signal to generate a first 3D image output signal.

The present invention further provides a method for converting an image signal, comprising receiving a 3D image input signal for generating a first control signal, a second control signal, a first vertical synchronization signal, and a 3D data stream; Controlling a signal, determining whether to generate a second vertical synchronization signal; when the second vertical synchronization signal is not generated, detecting the 3D data stream according to the first vertical synchronization signal, to generate a detection result; When the second vertical synchronization signal is generated, detecting the 3D data stream according to the second vertical synchronization signal to generate the detection result; and processing the detection result according to the second control signal, A first 3D image output signal is generated.

In order to make the features and advantages of the present invention more comprehensible, the preferred embodiments are described below, and are described in detail with reference to the accompanying drawings.

Figure 1 is a schematic view of an image conversion device of the present invention. As shown, the image conversion device 100 includes a 3D image receiver 110, a control unit 130, a detection unit 150, and a scaling unit 170. In this embodiment, the image conversion device 100 is configured to perform pre-processing of 3D video playback. In a possible embodiment, the data generated by the image conversion device 100 can be provided to a display panel or a projection device such that the display panel or the projection device presents a 3D image.

In FIG. 1, the 3D image receiver 110 receives a 3D image input signal S _IN for generating control signals S _C1 , S _C2 , a vertical sync signal V _{sync1 ,} and a 3D data stream S _3D . In the present embodiment, the 3D video receiver 110 based according to the 3D video input signal S _IN format (the format), generates control signals S _C1 and S _C2, and from 3D video input signal S _IN, the capture of a vertical synchronizing signal V _Sync1 and 3D data stream S3D.

In a possible embodiment, the 3D image input signal S _IN conforms to the High Definition Multimedia Interface (HDMI) 1.4 format. In general, HDMI 1.4 defines three 3D signal formats, the first is the frame packing format, the second is the side-by-side format, and the third is the top-and-bottom. )format. Since HDMI 1.4 is well known to those skilled in the art, it will not be described again.

The control unit 130 receives a vertical synchronization signal V _sync1, and in accordance with the control signal S _C1, determines the output vertical synchronizing signal V _sync1, or generates and outputs the vertical synchronizing signal V _sync2. In one possible embodiment, the frequency of the vertical synchronizing signal V _sync2 system is twice the frequency of the vertical synchronizing signal V _sync1. A micro control unit In another possible embodiment, the control unit 130 based (Micro Control unit; MCU), according to the 3D image format of the input signal S _IN, to selectively output the vertical synchronization signal V _sync1 or V _sync2.

The detecting unit 150 detects the 3D data stream S _3D according to the output of the control unit 130 to generate a detection result S _timing . In this embodiment, the detecting unit 150 performs timing detection on the 3D data stream S _3D to learn the resolution of the 3D data stream S _3D .

The scaling unit 170 processes the detection result S _timing according to the control signal S _{C2 for} generating the 3D image output signal S _OUT1 . In this embodiment, the scaling unit 170 is a scaling controller for adjusting the resolution of the 3D data stream S _3D according to the resolution of an external display panel.

Since the control unit 130 according to a control signal S _C1, selectively outputs the vertical synchronizing signal V _sync1 or V _sync2, and detecting 150 the output control unit 130, a data stream S 3D timing detection unit _3D, therefore, designated by the general The scaling controller can adjust the detection result of the detecting unit 150 without using a higher order scaling controller.

In addition, in this embodiment, the scaling unit 170 determines whether to process all the detection results S _timing according to the control signal S _C2 , or only processes a first portion of the detection result S _timing , and temporarily stores the detection result S A second part of _timing . Hereinafter, the operation mode of the control unit 130 and the scaling unit 170 when the 3D data stream S _3D extracted by the 3D video receiver 110 is the screen collection format, the parallel format, and the top and bottom formats, respectively.

Figures 2A and 2B are schematic diagrams of a picture collection format. FIG. 2A shows the relationship between the vertical sync signal V _sync1 and the 3D data stream S _3D generated by the 3D image receiver 110. As shown in FIG, 3D _3D data stream S is present between the vertical synchronizing pulse V _sync1 signal S _P1 and S _P2, S wherein the 3D data stream including left-eye _3D image data and right-eye image data _S IN_L1 _S IN_R1.

When the 3D image input signal S _IN is in the picture collection format, the 3D image receiver 110 generates a corresponding control signal S _C1 , so that the control unit 130 generates the vertical synchronization signal V _sync2 (as shown in FIG. 2B ). Fig. 2B shows the relationship between the vertical synchronizing signal V _sync2 generated by the control unit 130 and the 3D data stream S _3D .

As can be seen from FIG. 2B, the position of the pulse S _P3 is located in the space between the left-eye image data S _{IN_L1} and the right-eye image data S _{IN_R1} . Therefore, the detecting unit 150 can detect the _timings of the left-eye image data S _{IN_L1} and the right-eye image data S _{IN_R1} according to two adjacent pulses. The scaling unit 170 then easily disassembles the left and right eye information of the 3D image according to the detection result of the detecting unit 150, and then adjusts the left and right eye information of the 3D image according to the resolution of the display panel. degree.

In a possible embodiment, the control unit 130 generates an additional pulse S _P3 according to the pulses S _P1 and S _{P2 of the} vertical synchronization signal V _sync1 . In other embodiments, the pulse S _P3 can be generated in other ways.

Figure 2C is a schematic diagram of a general 2D image format. In general, between two pulses, there will only be one image data. However, in the 3D image format (please refer to Figure 2A), there will be two image data (S _{IN_L1} and S _{IN_R1} ) between the two pulses. Therefore, the amount of data in 3D images is twice that of a normal 2D image.

In addition, the screen collection format is the most commonly used 3D. Since the vertical sync signal V _sync2 can be generated by a simple control unit, the left and right eye information of the 3D image can be disassembled, and no additional memory is needed to store part of the image data.

Figure 3 is a schematic diagram of the parallel format. As can be seen from Fig. 3, the amount of data in the parallel format is the same as that in the 2D format, and the left-eye image data S _{IN_L2} and the right-eye image data S _{IN_R2} are placed on the left and right sides of the same frame.

When the 3D image input signal S _IN is in a parallel format, the 3D image receiver 110 generates a corresponding control signal S _C1 . The control unit 130 outputs a vertical synchronization signal V _sync1 according to the control signal S _C1 . The detecting unit 150 detects the timing of the 3D data stream S _3D according to the vertical synchronization signal V _sync1 output by the control unit 130. The calibration unit 170 processes only the first portion of the detection result S _timing (eg, the left eye image data S _{IN_L2} ) according to the control signal S _C2 , and temporarily stores the second portion of the detection result S _timing (the right eye image data S _{IN_R2} ) After the first part of the data is processed, the second part of the temporary data is processed.

For example, it is assumed that the detecting unit 150 detects that the resolution of the 3D data stream S _3D is 1926 X 1080 according to the vertical synchronization signal V _sync1 (ie, 1926 horizontal data lines, and each horizontal data line has 1080 pixels). data). If the first to 963 pixel data is the left eye image data S _{IN_L2} , and the first 964-1926 pixel data is the right eye image data S _{IN_R2} .

When the calibration unit receives the 1st to 963th pixel data of the 1st horizontal data line, it is processed immediately to make it 1926 pixel data, and then adjusted again according to the resolution of a display panel. The resolution of 1926 pixel data. In the present embodiment, the scaling unit 170 horizontally magnifies 963 pixel data. Since the method of converting 963 pixel data into 1926 pixel data is well known to those skilled in the art, it will not be described again.

When the calibration unit receives the 964th to 1926th pixel data of the first horizontal data line, it temporarily stores it, and then receives and processes the 1st to 963th pixel data of the 2nd horizontal data line. And temporarily store the 964th to 1926th pixel data of the second horizontal data line until the first to 963th pixel data of all horizontal data lines are processed, and then the temporarily stored pixel data is processed.

Figure 4 is a schematic diagram of the top and bottom format. When the 3D image input signal S _IN is in the top and bottom format, the 3D data stream S _3D has left eye image data S _{IN_L3} and right eye image data S _{IN_R3} . The left eye image data S _{IN_L3} and the right eye image data S _{IN_R3} are arranged up and down.

In this embodiment, the control unit 130 outputs a vertical synchronization signal V _sync1 . The detecting unit 150 knows the timing of the 3D data stream S _3D according to the vertical synchronization signal V _sync1 output by the control unit 130. The calibration unit 170 processes the detection result S _timing according to the control signal S _{C2 for} disassembling the left and right eye image data.

Suppose, the detecting unit 150 according to the vertical synchronization signal V _sync1, S may be a data stream that 3D _3D resolution of 1926X1080 (i.e. 1926 data horizontal lines, each horizontal line has 1080 pixels data information). The scaling unit 170 processes the first to 540 horizontal data lines to become 1080 horizontal data lines, and then adjusts the processed 1080 horizontal data lines according to the size of a display panel. In the present embodiment, the scaling unit 170 vertically enlarges 540 horizontal data lines.

Since the method of converting 540 horizontal data lines into 1080 horizontal data lines is well known to those skilled in the art, it will not be described again. Next, the scaling unit 170 converts the 541th to 1080th horizontal data lines to become 1080 horizontal data lines, and then adjusts the processed 1080 horizontal data lines according to the size of a display panel.

Figure 5 is another possible embodiment of the image conversion device of the present invention. Fig. 5 is similar to Fig. 1, except that Fig. 5 has a frame rate converter 510. The frame rate converter 510 adjusts the frame rate of the 3D image output signal S _OUT1 to generate a 3D image output signal S _OUT2 .

In the present embodiment, the frame rate converter 510 adjusts the frame rate of the 3D video output signal S _OUT1 according to the frequency at which the display panel 530 presents the picture (ie, the frame rate). For example, when the frame rate of the display panel 530 and the frame rate of the 3D image output signal S _OUT1 are too large, flickering is likely to occur. However, by adjusting the frame rate of the 3D image output signal S _OUT1 by the frame rate converter 510, the occurrence of flicker can be reduced.

The display panel 530 presents an image according to the 3D image output signal S _OUT2 . In other embodiments, the frame rate converter 510 may be omitted for cost savings. In this example, the display panel 530 can present an image according to the 3D image output signal S _{OUT1 of} FIG. 1 .

Figure 6 is a possible implementation of a method for converting an image signal of the present invention. First, a 3D image input signal is received for generating a first control signal, a second control signal, a first vertical synchronization signal, and a 3D data stream (step S610). In this embodiment, step 610 includes: generating first and second control signals according to a format of the 3D video input signal (step S611); and extracting the first vertical synchronization signal and the 3D data stream from the 3D video input signal (Step S613). In a possible embodiment, the 3D image input signal conforms to the HDMI 1.4 format.

Next, based on the first control signal, it is determined whether a second vertical synchronizing signal needs to be generated (step S630). In this embodiment, the frequency of the second vertical synchronizing signal is twice the frequency of the first vertical synchronizing signal.

In another possible embodiment, when the 3D video input signal is in a picture set format, a second vertical synchronization signal is generated. When the 3D image input signal is in a parallel format or a top and bottom format, the second vertical sync signal is not generated.

When the second vertical synchronization signal is not generated, the 3D data stream is detected according to the first vertical synchronization signal to generate a detection result (step S650). When the second vertical synchronization signal is generated, the 3D data stream is detected according to the second vertical synchronization signal to generate a detection result (step S670).

The detection result is processed according to the second control signal to generate a first 3D image output signal (step S690). In a possible embodiment, a display panel or a projection device can present a corresponding picture according to the first 3D image output signal. In another possible embodiment, the frame rate of the first 3D image output signal may be adjusted to generate a second 3D image output signal, and then the second 3D image output signal is provided to a display panel or a projection device. .

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100. . . Image conversion device

110. . . 3D image receiver

130. . . control unit

150. . . Detection unit

170. . . Calibration unit

510. . . Frame rate converter

530. . . Display panel

Figure 1 is a schematic view of an image conversion device of the present invention.

Figures 2A and 2B are schematic diagrams of a picture collection format.

Figure 2C is a schematic diagram of a general 2D image format.

Figure 3 is a schematic diagram of the parallel format.

Figure 4 is a schematic diagram of the top and bottom format.

Figure 5 is another possible embodiment of the image conversion device of the present invention.

Figure 6 is a possible implementation of a method for converting an image signal of the present invention.

100. . . Image conversion device

110. . . 3D image receiver

130. . . control unit

150. . . Detection unit

170. . . Calibration unit

Claims (13)

An image conversion device includes: a 3D image receiver, receiving a 3D image input signal for generating a first control signal, a second control signal, a first vertical synchronization signal, and a 3D data stream; a control unit Receiving the first vertical synchronization signal, and determining to output the first vertical synchronization signal or a second vertical synchronization signal according to the first control signal; a detecting unit, detecting the 3D according to the output of the control unit The data stream is used to generate a detection result; and the calibration unit processes the detection result according to the second control signal to generate a first 3D image output signal. The image conversion device of claim 1, wherein the 3D image receiver generates the first and second control signals according to the format of the 3D image input signal, and extracts the signal from the 3D image input signal. The first vertical sync signal and the 3D data stream. The image conversion device of claim 1, wherein the frequency of the second vertical synchronization signal is twice the frequency of the first vertical synchronization signal. The image conversion device of claim 1, further comprising: a frame rate converter, configured to adjust a frame rate of the first 3D image output signal to generate a second 3D image output signal. The image conversion device of claim 4, further comprising: a display panel for presenting an image according to the first or second 3D image output signal. The image conversion device of claim 1, wherein the calibration unit determines whether to process all the detection results according to the second control signal, or only processes a first portion of the detection result, and A second part of the detection result is temporarily stored. The image conversion device of claim 6, wherein when the 3D image input signal is in a frame packing format, the control unit outputs the second vertical synchronization signal, and the scaling unit processes The detection result is that the frequency of the second vertical synchronization signal is twice the frequency of the first vertical synchronization signal. The image conversion device of claim 6, wherein when the 3D image input signal is in a side-by-side format, the control unit outputs the first vertical synchronization signal, and the calibration The unit processes only the first portion of the detection result and temporarily stores the second portion of the detection result. The image conversion device of claim 6, wherein when the 3D image input signal is in a top-and-bottom format, the control unit outputs the first vertical synchronization signal, and the calibration The unit processes the detection result. A method for converting an image signal includes: receiving a 3D image input signal for generating a first control signal, a second control signal, a first vertical synchronization signal, and a 3D data stream; according to the first control signal, Determining whether to generate a second vertical synchronization signal; when the second vertical synchronization signal is not generated, detecting the 3D data stream according to the first vertical synchronization signal, to generate a detection result, when the second When the vertical synchronization signal is generated, the 3D data stream is detected according to the second vertical synchronization signal to generate the detection result; and the detection result is processed according to the second control signal, to generate a first A 3D image output signal. The method for converting an image signal according to claim 10, wherein the generating the first and second control signals, the first vertical synchronization signal, and the 3D data stream comprises: inputting a signal according to the 3D image Formatting, generating the first and second control signals; and extracting, by the 3D video input signal, the first vertical synchronization signal and the 3D data stream. The method for converting an image signal according to claim 10, wherein the frequency of the second vertical synchronizing signal is twice the frequency of the first vertical synchronizing signal. The method for converting an image signal according to claim 10, further comprising: adjusting a frame rate of the first 3D image output signal to generate a second 3D image output signal.