JPH05211663A - Image communication telephone set - Google Patents

Abstract

(57) [Summary] [Purpose] A different background image is embedded in one or more colors of the main image. [Structure] A main image and a background image are selected by the video input interface unit 3, and the selected main image and background image are chroma-key combined by a chroma-key combining unit 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication telephone.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional image communication telephone.

An input image from the camera input section 1 is input to the image memory section 6 via the video input / output interface section 3, and the image from the image memory section 6 is input to the video encoding section 7.
CCITT Recommendation H. The encoding process is performed according to H.261. On the other hand, the input voice from the handset 8 is
The voice encoding unit 1 via the voice input / output interface unit 9
0a, and the voice encoding unit 10a outputs 64 kb.
ps PCM A-law, 64 kbps PCM μ
-Law, 64 kbps / 56 kbps / 48 kbps
SB-ADPCM, 32 kbps ADPCM, 16
It is encoded according to a voice encoding algorithm such as kbps (for example, APC-AB) or 8 kbps.

Then, the input voice coded by the voice coding unit 10a, the input image coded by the video coding unit 7a, and the control signal from the system control unit 12 are separated by the demultiplexing unit 13. CCITT Recommendation H. 22
A line interface unit 14 that controls the line according to the ISDN user / network interface.
Is transmitted to the communication line 15 via.

The received signal from the communication line 15 is input to the demultiplexing / multiplexing unit 13 via the line interface unit 14,
CCITT Recommendation H.264 by the demultiplexing unit 13. 221 is separated into an image signal and an audio signal, the image signal is input to the video decoding unit 7b, and the audio signal is input to the audio decoding unit 10.
Input to b. The image signal input to the video decoding unit 7b is decoded into a received image, and the image memory unit 6 performs picture-in-picture (PinP) processing,
It is displayed on the LCD display unit 2 via the video output interface unit 4. On the other hand, the voice signal input to the voice decoding unit 10b is decoded by the voice decoding unit 10b and output to the handset unit 8 via the voice input / output interface unit 9.

In addition to the image received from the other party, the LCD display unit 2 displays an input image, an operation screen by the operation unit 11, and the like.

In the voice input / output interface section 9, the handset 8 is controlled by the system control section 12.
Echo cancellation processing to cancel the echo when using, dial tone, ring tone, busy tone,
Processing for generating a tone such as an incoming call is performed.

[0008]

However, in the above-described conventional example, the PinP function is the only function that can synthesize a plurality of input images and use the plurality of images at the same time.

An object of the present invention is to solve the above-mentioned problems and provide an image communication telephone capable of automatically fitting different background images into one or more color portions of a main image. is there.

[0010]

In order to achieve such an object, the present invention provides an image communication telephone having an input signal switching unit for inputting a plurality of image signals and switching the input signals, and a plurality of images in a main image. Chroma-key processing means for fitting one or more background images in the color area of, and a chroma-key color for automatically setting the color level processed by the chroma-key processing means when the color area in the main image is designated. The automatic level setting means is provided.

[0011]

According to the present invention, a plurality of image signal input functions,
In the image communication telephone having the input signal switching function, the so-called chroma key processing function of fitting the background image into the main image is provided as an image synthesizing function by providing chroma key processing means at the subsequent stage of the input signal switching unit. In setting the background RGB level for chroma key processing, by providing a chroma key color level automatic setting means capable of automatically setting the RGB level of the area by designating the color area in the main image, the background for chroma key processing is provided. Provides a function to automatically set RGB levels.
As a result, the troublesomeness of recognizing and instructing the color level of the area of the main image to be subjected to the chroma key processing by bothering is eliminated.

Further, the chroma key processing means is provided with means capable of arbitrarily setting the background RGB level for chroma key processing, thereby providing a function of fitting the background image in a portion of an arbitrary color.

Further, a plurality of background RGB levels for chroma key processing are set, and a means for enabling a different background image to be inserted for each RGB level is provided, so that different portions of the main image can be made different in arbitrary plural colors. It also provides a function to insert multiple background images.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. This is an example of a multimedia communication device. In FIG. 1, FIG.
The same parts as are denoted by the same reference numerals. Reference numeral 5 denotes a chroma key composition unit that sets one or more background color levels for the image from the camera input unit 1 input via the video input interface unit 3 and sets one or more background color levels for the main image. A background image is fitted into each color portion of the color level.

FIG. 2 shows the configuration of the chroma key combination unit 5 shown in FIG.

In the figure, 5a is an NTSC-to-RGB converter, which is a signal for the main image, a signal for the background image 1, and a signal for the background image 2, which are assigned by the changeover switch in the video interface unit 3, as RGB signals. Is to be converted to.

Reference numeral 5d is an RGB signal switching level detection unit which, under the control of the system control unit 12, has an RGB level equal to the background color level for chroma key processing, and NTSC.
→ Pixels in the main image signal from the RGB converter 5a are detected. 5e is a chroma key signal switching control unit, which is R
The detection signal detected by the GB signal switching level detection unit 5d is converted into an RGB composite timing signal for chroma key processing. A chroma key signal high-speed switching unit 5b switches to another background image signal in accordance with the RGB composition timing signal from the chroma key signal switching control unit 5e. Reference numeral 5c is an RGB → NTSC converter, which converts the RGB signal from the chroma key signal high-speed switching unit 5b into an NTSC signal. It is omitted when the interface of the image memory unit 6 is an RGB signal.

Next, referring to FIG. 2, the chroma key composition section 5
The operation of will be described.

When a plurality of image input signals are output from the video input interface section 3, the changeover switch of the video input interface section 3 is used to select the main image and the background image 1.
And the background image 2 signals are arbitrarily assigned. Each signal is RG by the NTSC → RGB conversion unit 5a.
It is converted into a B signal and output to the chroma key signal high speed switching unit 5b. Further, the main image signal is output to the chroma key signal high-speed switching unit 5b and at the same time is output to the RGB signal switching level detection unit 5d. The RGB signal switching level detection unit 5d detects a pixel in the main image signal having an RGB level equal to the background color level for chroma key processing instructed by the system control unit 12, and sends the detection signal to the chroma key signal switching control unit 5e. Output. The chroma key signal switching control unit 5e converts the input detection signal into an RGB composite timing signal for chroma key processing and outputs it to the chroma key signal high speed switching unit 5b.

In the chroma key signal high speed switching section 5b, the NT
With respect to a plurality of RGB signal inputs from the SC → RGB conversion unit 5a, a switch is usually set for the main image signal, and another background image is generated according to the RGB combination timing signal from the chroma key signal switching control unit 5e. The signal is switched on. As a result, the main image signal and the plurality of background image signals are combined at the pixel level, and the RGB → NTSC conversion unit 5c converts the signals into the NTSC signal as the output of the chroma key processing unit 5.

FIG. 3 shows a display example of the LCD display unit 2.

FIG. 3A shows a normal videophone screen. In the figure, 17 is a parent screen and 23 is a child screen.
Reference numeral 21 is a chroma key ON / OFF key for turning on / off the chroma key processing. A chroma key setting key 22 is used to make various settings for chroma key processing. Reference numeral 16 is a numeral key for inputting a number, 18 is a key input numeral display portion, 19 is an input number correction key, and 20 is a calling key.

In FIG. 3B, the chroma key setting key 22 is O.
It is a chroma key input setting mode screen which is switched when N is selected. The previous screen key 24 shown in FIG. 3B is a key for returning to the previous screen, and the end key 25 is a key for ending the chroma key processing. When the end key 25 is pressed, the screen returns to the normal videophone screen shown in FIG.

When performing chroma key processing, first, the input setting key 26 is used to set the input camera for the main image and the background image. For example, the main image 34 (4
Camera C1 for the image 35 as a background B1 (see FIG. 4) and for the image C3 as a background B2 (see FIG. 4). An example in which the camera C2 is set is shown in FIG.

Next, the color level setting selection key 27 is operated in order to shift to the screen for setting the color level when the background image is chroma-keyed to the main image. For example, background B1
Alternatively, the color level setting selection key 27 displayed as background B2
Of these, the color level setting selection key 2 displayed as background B1
When 7 is operated, the screen shifts to the chroma key color level setting mode screen for the background image B1 shown in FIG. 3 (c). In this screen, as shown in FIG. 3C, the main image subjected to the chroma key processing is displayed on the child screen 23, and the background image B1 is displayed on the other child screen 32.

When this screen is displayed, the color level can be set and the background image B1 can be set by pressing the color level setting key 28.
When the color level of the main image to be fitted is set, the set RGB color levels are displayed on the RGB display unit 29, and the composite color is displayed on the color display unit 30.

Although the main image subjected to chroma key processing is displayed on the child screen 23, the background image is not embedded in the display portion of the background image (here, the background image B1) for which the color level is being set, and the color level is not set. Display the opposite color of. The background image B1 for which the color level is being set is displayed on the other child screen 32.

FIG. 4 shows an example of a screen display when the chroma key is ON.

An image 34 having four color levels is input as an input image of the camera C1, a vertical stripe image 35 is input as an input image of the camera C2, and a horizontal stripe image 36 is input as an input image of the camera C3. Camera C1 for the main image and background image B
When the camera C3 is set to 1 and the camera C2 is set to the background image B2, and the chroma key processing is turned on, if the color level of the background image B1 is 1 and the color level of the background image B2 is 2, like the image 37, If the color level of the background image B1 is 3 and the color level of the background image B2 is 1, chroma key processing is performed as in the image 38.

On the other hand, when the automatic mode key 31 is operated, the chroma key color level automatic setting mode in which the chroma key color level can be automatically set from the designated color area is set, and the screen is the screen shown in FIG. 3 (d). Switch to. On this screen, a chroma key color level automatic setting display screen 33 is displayed. On the chroma key color level automatic setting display screen 33, the main image obtained by chroma keying all the background screens is displayed, and the color portion to which the background image B1 is to be fitted is displayed. By touching, the background image B1 moves to that color portion. Also, the RGB level corresponding to this color level is automatically set to R.
The internal data is modified so as to be displayed on the GB level display unit 29.

[0032]

As described above, by carrying out the present invention, the effects listed below can be obtained.

(1) In an image communication telephone having a plurality of image signal input functions and a switching function of the input signals,
By providing the chroma key processing means in the subsequent stage of the input signal switching unit, one image (main image) can be fitted with another image (background image). At this time, when the background RGB level for chroma key processing is set, the chroma key color level automatic setting means for automatically setting the RGB level of the color region in the main image by designating the color region in the main image is provided. The color level can be set automatically.

(2) In the above-mentioned chroma key processing means, by providing background color level setting means for arbitrarily setting the background color level for chroma key processing, the background image can be embedded in an arbitrary color portion of the main image. You can

(3) A plurality of different background images can be fitted in arbitrary color portions of the main image.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a chroma key combination unit 5 shown in FIG.

FIG. 3 is a diagram showing a display example of an LCD display unit 2 during chroma key processing.

FIG. 4 is a diagram for explaining a chroma key processing method.

FIG. 5 is a block diagram showing a configuration of a conventional image communication telephone.

[Explanation of symbols]

 1 Camera Input Section 2 Display Section 3 Video Input Interface Section 4 Video Output Interface Section 5 Chroma Key Compositing Section 6 Image Memory Section 7 Video Encoding / Decoding Section 8 Handset 9 Audio Input / Output Interface Section 10 Audio Encoding / Decoding Section 11 Operation Section 12 system control unit 13 demultiplexing unit 14 line interface unit 15 communication line

Claims (3)

[Claims] 1. In an image communication telephone having an input signal switching unit for inputting a plurality of image signals and switching the input signals, a chroma key process for fitting one or a plurality of background images into a plurality of color regions of a main image. And a chroma key color level automatic setting means for automatically setting a color level processed by the chroma key processing means when a color area in the main image is designated. Telephone. 2. The method according to claim 1, wherein the chroma-key processing means is provided with means capable of arbitrarily setting a background RGB level for chroma-key processing, so that the background image is fitted in a portion of an arbitrary color. Image communication telephone. 3. The chroma key processing means according to claim 2, wherein a plurality of background RGB levels for chroma key processing are set, and means for enabling a different background image to be fitted for each RGB level is provided. An image communication telephone characterized in that a plurality of different background images are fitted into arbitrary color portions of a main image.