KR20120109182A - Method for 3d image transmission using interlace and thereof apparatus - Google Patents

Abstract

PURPOSE: A three-dimensional image transmitting method and an apparatus thereof using an interlace method are provided to transmit an even line signal and an odd line signal within a left-eye frame image and a right-eye frame image. CONSTITUTION: A transmission apparatus transmits a first image signal including odd line signals within a left-eye frame image(S110). The transmission apparatus transmits a second image signal including even line signals within a right-eye frame image(S120). The transmission apparatus transmits a third image signal including even line signals within the left-eye frame image(S130). The transmission apparatus transmits a fourth image signal including even line signals within the right-eye frame(S140). [Reference numerals] (AA) Start; (BB) End; (S110) Transmitting a first image signal including odd line signals within a left eye frame image; (S120) Transmitting a second image signal including even line signals within a right eye frame image; (S130) Transmitting a third image signal including even line signals within a left eye frame image; (S140) Transmitting a fourth image signal including even line signals within a right eye frame image

Description

Method and apparatus for 3D image transmission using interlace method

The present invention relates to a 3D image transmission method and apparatus using an interlace method, and more particularly, to a 3D image transmission method and apparatus using an interlace method in 3D image transmission.

3D stereoscopic imaging technique uses binocular disparity. According to the above technique, the eyes of the left and right eyes see different two-dimensional images, and when these two images are transmitted to the brain through the retina, the brain can accurately fuse them with each other to reproduce the depth and reality of the original three-dimensional stereoscopic image. have. The 3D stereoscopic image generates information that can be additionally obtained in the 2D image, and enables the human to feel a sense of life and reality as if the human being is in the place where the image is being produced.

Conventionally, in order to transmit a 3D stereoscopic image, a method of alternately transmitting a left eye image and a right eye image at predetermined time intervals is used. Accordingly, while the left eye image and the right eye image are alternately displayed quickly, a stereoscopic image is realized.

However, in the conventional case, since both the left eye image and the right eye image are both used, the amount of transmission of the image is doubled, and thus data processing is complicated, processing time increases, and it is not applicable to HDTV.

An object of the present invention is to provide a three-dimensional image transmission method and apparatus using an interlace method that can reduce the amount of data transmission by alternately transmitting the odd-line and even-line signals in the right eye image and the left eye image at time intervals. There is this.

The present invention provides a method of transmitting a 3D image to a receiving apparatus using an interlace method, the method comprising: transmitting a first image signal including odd line signals in a left eye frame image, and an odd line in a right eye frame image Transmitting a second image signal including signals; transmitting a third image signal including even line signals in the left eye frame image; and a fourth including even line signals in the right eye frame image. It includes a step of transmitting a video signal, and provides a three-dimensional video transmission method using an interlace method for sequentially and repeatedly transmitting the first to fourth video signal.

The odd line signals may correspond to odd-numbered lines among the vertical lines of the frame image, and the even-line signals may represent signals corresponding to even-numbered lines among the vertical lines of the frame image.

In addition, the odd line signals may be signals for odd-numbered lines among the horizontal lines of the frame image, and the even-line signals may represent signals for even-numbered lines among the horizontal lines of the frame image.

The receiver may receive the first to fourth image signals, identify whether a pixel included in the blank line of the received video signal is a moving picture pixel or a still image pixel, and then include the blank line in the blank line. If the pixel is a video pixel, spatial interpolation may be performed, and if the pixel is a still image pixel, temporal interpolation may be performed.

In this case, when the pixel included in the blank line of the received N-th image signal is a still image pixel, the receiving device may include the pixel value at the same position included in the blank line of the N-2th image signal and the N + 2th image. The corresponding pixel is interpolated using an intermediate value of pixel values of the same position included in the blank line of the signal, and N may be a natural number of 3 or more.

In addition, when the pixel included in the blank line of the received N-th image signal is a video pixel, the receiver interpolates the corresponding pixel by using an intermediate value of pixel values of both sides adjacent to the pixel included in the blank line. can do.

In addition, the present invention provides a method for transmitting a 3D image to a receiving apparatus using an interlace method, comprising: a receiver configured to receive a left eye frame image and a right eye frame image, and odd line signals in the left eye frame image Transmitting a first image signal, transmitting a second image signal including odd line signals in the right eye frame image, transmitting a third image signal including even line signals in the left eye frame image, and And a transmitter for transmitting a fourth image signal including even-line signals in the frame image for the right eye, wherein the transmitter includes three-dimensional image transmission using an interlace method for sequentially and repeatedly transmitting the first to fourth image signals. Provide the device.

Here, the receiving apparatus may include a signal receiving unit for receiving the first to fourth image signals, an identification unit for identifying whether a pixel included in a blank line of the received image signal is a moving image pixel or a still image pixel, and the If the pixel included in the blank line is a moving image pixel, the interpolation unit may perform spatial interpolation, and in the case of the still image pixel, the interpolation unit may perform temporal interpolation.

According to the 3D image transmission method and apparatus using the interlace method according to the present invention, the data transmission amount is changed by alternately transmitting the odd line signal and the even line signal in the left eye frame image and the right eye frame image at intervals. There is an advantage that can be reduced, thereby increasing the data transmission efficiency.

1 is a flowchart of a 3D image transmission method using an interlace method according to an embodiment of the present invention.
2 is a system configuration diagram for FIG. 1.
3 is a flowchart illustrating an embodiment of a left eye frame image and a right eye frame image corresponding to FIG. 1.
4 is a flowchart illustrating another embodiment of a left eye frame image and a right eye frame image corresponding to FIG. 1.
5 is a conceptual diagram illustrating an interpolation method using the receiver of FIG. 1.

DETAILED DESCRIPTION Embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is a flowchart of a 3D image transmission method using an interlace method according to an embodiment of the present invention. 2 is a system configuration diagram for FIG. 1. The system includes a transmitter 100 and a receiver 200.

Here, the transmitter 100 includes a receiver 110 and a transmitter 120. The receiver 110 receives the previously collected left eye frame image and the right eye frame image from the outside. The transmitter 120 interlaces each frame image to transmit the odd line signals and the even line signals in the received left eye frame image and the right eye frame image alternately at minute time intervals to be transmitted to the receiver 200. do.

One frame image is composed of a plurality of lines (scan lines), and each line is composed of a plurality of pixels. When the line is viewed based on the vertical direction, each vertical line is composed of a plurality of pixels along the vertical direction. In addition, when the line is viewed based on the horizontal direction, each horizontal line includes a plurality of pixels along the horizontal direction.

The receiving device 200 interpolates the blank line portion in each video signal received from the transmitting device 100 and fills in the information of the empty pixels in the blank line.

Hereinafter, a three-dimensional image transmission method using the interlace method will be described in detail. 3 is a flowchart illustrating an embodiment of a left eye frame image and a right eye frame image corresponding to FIG. 1. 3 illustrates a case in which the line is set based on the vertical direction.

For reference, in this exemplary embodiment, the odd line signals are signals for odd lines among the vertical lines of the frame image of FIG. 3, and the even line signals are even lines among the vertical lines of the frame image of FIG. 3. Indicates a signal for these.

Referring to FIG. 3, first, the transmission apparatus 100 transmits a first image signal including odd line 11 signals in a left eye frame image (S110). That is, in step S110, the even-line signals in the left eye frame image are processed to be blank to transmit the image signal. Accordingly, in step S110, even lines in the left eye frame image correspond to blank lines.

Next, the second image signal including the odd line 21 signals in the right eye frame image is transmitted (S120). That is, in step S120, the even-line signals in the right eye frame image are processed to be blank to transmit an image signal. Accordingly, in operation S120, even lines in the right eye frame image correspond to blank lines.

Thereafter, the third image signal including the even-line 12 signals in the left eye frame image is transmitted (S130). That is, in operation S130, odd-line signals are processed as blanks in the left eye frame image and the image signal is transmitted. Accordingly, in operation S130, odd lines in the left eye frame image correspond to blank lines.

Next, a fourth image signal including the even line 22 signals in the right eye frame image is transmitted (S140). That is, in operation S140, odd-line signals are processed to be blank in the frame image for the right eye and the image signal is transmitted. Accordingly, in operation S140, odd lines in the right eye frame image correspond to blank lines.

In this case, the transmission device 100 sequentially and repeatedly transmits the first to fourth video signals. In this case, the transmission interval of each video signal may be 1/120 seconds. For example, the first video signal is transmitted at 1/120 seconds, the second video signal at 2/120 seconds, the third video signal at 3/120 seconds, and the fourth video signal at 4/120 seconds. . Here, since the first video signal and the third video signal are related to the left eye image, and the second and fourth video signals are related to the right eye image, the transmission interval between the left eye images is 1/60 second and the right eye is The transmission interval between the dragon images corresponds to 1/60 seconds.

4 is a flowchart illustrating another embodiment of a left eye frame image and a right eye frame image corresponding to FIG. 1. 3 illustrates a case in which the line is set based on the horizontal direction. That is, in this other embodiment, the odd line signals are signals for odd lines among the horizontal lines of the frame image of FIG. 4, and the even line signals are even lines among the horizontal lines of the frame image of FIG. 4. Represents a signal for.

4, the odd line 11a signal of the left eye frame image is input in step S110, the odd line 21a signal of the right eye frame image is input in step S120, and the even line 12a of the left eye frame image is input in step 130. ) Signal, and transmits the even line 22a signal of the frame image for the right eye in operation S140. Since the transmission method using another embodiment of FIG. 4 is the same as the principle of the embodiment of FIG. 3, detailed description thereof will be omitted.

After receiving the first to fourth image signals through the signal receiver 210, the receiver 200 identifies whether a pixel included in a blank line of the received image signal is a video pixel or a still image pixel. Identify via 220. Then, the reception apparatus 200 performs spatial interpolation when the pixel included in the blank line is a moving image pixel through the image interpolation unit 230 and performs temporal interpolation when the pixel is a still image pixel.

5 is a conceptual diagram illustrating an interpolation method using the receiver of FIG. 1. 5 illustrates that each vertical line constituting the frame image is composed of four pixels for convenience of description, but the present invention is not necessarily limited thereto. Hereinafter, an interpolation method of still and moving picture pixels will be described with reference to FIG. 5.

First, an interpolation method for still image pixels is described. When the pixel included in the blank line of the received N-th image signal is a still image pixel, the image interpolation unit 230 includes N + 2 and a pixel value at the same position included in the blank line of the N-2th image signal. The corresponding pixel is interpolated by using an intermediate value of pixel values of the same position included in the blank line of the first image signal. In this case, N is a natural number of 3 or more.

The reason for performing interpolation using the N + 2 and N-2th image signals is that temporal interpolation of still image pixels for the left eye frame image is performed between the left eye frame images and the still image frame for the right eye frame image. Temporal interpolation of image pixels is to perform frame images for the right eye.

Here, the case where N = 3 is taken as an example. In FIG. 5, when the pixel P1 included in the blank line of the third video signal is a still image pixel, the image interpolator 230 may include the pixel P2 value and the fifth pixel at the same position included in the blank line of the first video signal. The corresponding pixel P1 is interpolated using an intermediate value of the pixel P3 values at the same position included in the blank line of the image signal, that is, an average value of P2 and P3. Herein, it is obvious that the pixel value includes the R-G-B value of the pixel.

Next, an interpolation method for still image pixels will be described. When the pixel included in the blank line of the received N-th image signal is a video pixel, the image interpolation unit 230 uses the intermediate value of pixel values of both sides adjacent to the pixel included in the blank line. Interpolate

Here, the case where N = 2 is taken as an example. When the pixel P4 included in the blank line of the second video signal is a video pixel, the image interpolator 230 may be an intermediate value of pixel values P5 and P6 on both sides adjacent to the pixel included in the blank line. The corresponding pixels are interpolated using the average values of P5 and P6. By the above method, interpolation is performed while all the pixel information in the blank lines is filled.

According to the present invention as described above, the data transmission amount can be reduced by alternately transmitting the odd-line and even-line signals in the left eye frame image and the right eye frame image at time intervals, thereby improving data transmission efficiency. There is an advantage to increase.

Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely exemplary and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: transmitter 110: receiver
120: transmitter 200: receiver
210: signal receiving unit 220: identification unit
230: video interpolator

Claims (12)

In the method for transmitting a three-dimensional image to the receiving apparatus using an interlace method,
Transmitting a first image signal including odd line signals in a left eye frame image;
Transmitting a second image signal including odd line signals in a right eye frame image;
Transmitting a third image signal including even line signals in the left eye frame image; And
Transmitting a fourth image signal including even line signals in the right eye frame image,
3D image transmission method using an interlace method of sequentially and repeatedly transmitting the first to fourth image signals. The method according to claim 1,
The odd-line signals are signals for odd-numbered lines among the vertical lines of the frame image, and the even-line signals are three-dimensional using an interlace method representing signals for even-numbered lines among the vertical lines of the frame image. Video transmission method. The method according to claim 1,
The odd line signals are signals for odd-numbered lines among the horizontal lines of the frame image, and the even-line signals are three-dimensional using an interlace method representing signals for even-numbered lines among the horizontal lines of the frame image. Video transmission method. The method according to claim 1,
The receiving device,
When the first to fourth image signals are received, and whether a pixel included in the blank line of the received image signal is a video pixel or a still image pixel, the pixel included in the blank line is a video pixel. 3D image transmission method using an interlace method for performing spatial interpolation and temporal interpolation in the case of a still image pixel. The method of claim 4,
When the pixel included in the blank line of the received N-th image signal is a still image pixel, the receiving device includes:
The interpolated pixel is interpolated by using a middle value between the pixel value at the same position included in the blank line of the N-2th video signal and the pixel value at the same position included in the blank line of the N + 2th video signal.
The N is a three-dimensional image transmission method using an interlace method of three or more natural numbers. The method of claim 4,
When the pixel included in the blank line of the received N-th image signal is a video pixel, the receiving device includes:
3. The 3D image transmission method using the interlace method of interpolating a corresponding pixel using an intermediate value of pixel values of both sides adjacent to a pixel included in the blank line. In the method for transmitting a three-dimensional image to the receiving apparatus using an interlace method,
A receiver for receiving a left eye frame image and a right eye frame image;
Transmitting a first image signal including odd line signals in the left eye frame image, transmitting a second image signal including odd line signals in the right eye frame image, and applying even line signals in the left eye frame image A transmission unit for transmitting a third image signal including a fourth image signal including an even line signal in the frame image for the right eye,
Wherein the transmission unit comprises:
3D image transmission apparatus using an interlace method for sequentially and repeatedly transmitting the first to fourth image signals. The method of claim 7,
The odd-line signals are signals for odd-numbered lines among the vertical lines of the frame image, and the even-line signals are three-dimensional using an interlace method representing signals for even-numbered lines among the vertical lines of the frame image. Video transmission device. The method of claim 7,
The odd line signals are signals for odd-numbered lines among the horizontal lines of the frame image, and the even-line signals are three-dimensional using an interlace method representing signals for even-numbered lines among the horizontal lines of the frame image. Video transmission device. The method of claim 7,
The receiving device,
A signal receiver configured to receive the first to fourth video signals;
An identification unit for identifying whether a pixel included in a blank line of the received image signal is a moving image pixel or a still image pixel; And
And a video interpolation unit performing spatial interpolation when the pixel included in the blank line is a video pixel and temporal interpolation when the pixel is a still image pixel. The method of claim 10,
When the pixel included in the blank line of the received N-th image signal is a still image pixel, the receiving device includes:
The interpolated pixel is interpolated by using a middle value between the pixel value at the same position included in the blank line of the N-2th video signal and the pixel value at the same position included in the blank line of the N + 2th video signal.
The N is a three-dimensional image transmission device using an interlace method of three or more natural numbers. The method of claim 10,
When the pixel included in the blank line of the received N-th image signal is a video pixel, the receiving device includes:
And an interlace method for interpolating a corresponding pixel using an intermediate value of pixel values of both sides adjacent to a pixel included in the blank line.

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