Interactive video equipment and method for applying subtitles to image by means of said equipment

FIELD: technology for applying subtitles for interactive video equipment, in particular, interactive video equipment and software method for applying subtitles, used in current video equipment.

SUBSTANCE: control level of interactive video equipment receives information from user about subtitles necessary to be generated, in the coder of interactive video equipment on transferring assembly following stages are performed: receipt of information about subtitles from control level and following generation of subtitle image on transparent background in accordance to aforementioned received information; application of aforementioned image of subtitles to digital service image before encoding, sent from transferring node, with production of digital image, mixed with image of subtitles, and encoding of aforementioned mixed digital image with its following transmission to remote node.

EFFECT: simplification of used technical means, decreased cost of system, simplified generation and application of subtitles.

2 cl, 4 dwg

 

The technical FIELD

The invention relates to a method of overlay titles for interactive video equipment, and more exactly, to interactive video equipment and software method to overlay titles used in this video equipment. Using this method, you can easily generate captions for a video conferencing system and mix the signals titles with image signals for transmission.

BACKGROUND of the INVENTION

In the video conferencing system, as a rule, you need to put a few characters in the image; such characters as the name of the venue, etc. are called titles. This is usually performed with the help of special equipment, such as a title generator, as shown in figure 1. The device overlay titles connected in series between the equipment for video conferencing and TV, and it generates the necessary titles and plots it on the image signals for display on the TV.

This method has the following disadvantages. You need to install additional special equipment overlay titles, which increases the complexity and cost of the system; applied captions can be displayed only on the local TV, they cannot be transferred to other display, remote TVs, involved in video conferencing. This is without a doubt n is convenience.

The INVENTION

The aim of the invention is to provide a method of generating and overlay titles in the interactive video system. The method allows us to simplify the involved technical tools and to reduce system cost and simplifies the generation and application of credits; the credits can be mixed with the service image for remote transmission.

The basic concept of the invention is as follows. Program overlay titles receives from the control level information about the titles that you want to generate; using this information, the program overlay titles generates the image title on a transparent background and then place the image titles on the service image to produce images with titles intended for display or transmission.

In the invention, a method for overlay titles used in the interactive video equipment, in which the level control interactive video equipment receives user-defined information about the titles that you want to generate, and the method comprises the following steps performed in the encoder interactive video equipment on the sending node:

A. obtaining information about the titles from the control level and the subsequent generation of image titles on a transparent background in accordance with the specified PR is natoi information;

C. the imposition of the specified image titles on the digital service image before encoding, sent from the transmitting node, receiving the digital image, the mixed image titles, and encoding the hybrid digital image with its subsequent transfer to the remote host.

In addition, in the invention, a method for overlay titles used in the interactive video equipment, in which the level control interactive video equipment receives user-defined information about the titles that you want to generate, and the method comprises the following steps performed in the decoder interactive video receiving site:

A. obtaining information about the titles from the control level and the subsequent generation of image titles on a transparent background in accordance with the specified approved information;

C. decoding digital service image received from a remote node, the imposition of the specified image titles on this decoded digital service image obtaining digital images, mixed with image captions, and subsequent display on the receiving node.

Preferably, the information about the credits that need to be generated, transmitted from the management level to the generation module titles,contained internal codes of all characters, titles, information about the location of titles, information about the size of the credits and information about the color of the caption.

Preferably, the information about the credits that need to be generated, transmitted from the management level to the generation module titles, contained internal codes of all of the generated symbols of the above titles, and internal data codes generated in the following sequence: use the program, generating a database of characters: choose a vector font; display using software one after the other symbols on the screen of the PC in accordance with the required amount of characters and then writes the result display in the form of dot-matrix and save this image as dot-matrix in a special format as the database file of characters.

Preferably, the information about the credits that need to be generated, transmitted from the management level to the generation module titles, contained information about the color of the title; the generation module title carries out the installation of or changing the color of characters in accordance with the information about the color of the titles and supports background image title transparent.

Preferably, the step And included the reading dot matrix images of all characters and combining dot matrix images with transparent the background according to the location of placement and content titles, selected on the control level after the generation module titles will receive from the control level of the above-mentioned information about the titles.

Preferably, the control level, you can make a choice whether the overlaying is performed on a local or remote host. When choosing a local host image credits to be applied on the received local service node image after decoding and then take the local node to display. When choosing a remote site, the image title is applied for transmission to local service image before encoding, then perform the coding and transmit to the remote host after the encoding.

The invention also provides interactive video equipment with a level control, used for receiving user-defined information about the titles that you want to generate. Interactive video equipment includes a generation module title and module overlay titles. The generation module title is used to retrieve from the control level information about the credits that need to be generated, and generating the image title on a transparent background in accordance with the specified approved information;

module overlay titles is used to overlay the specified image titles on the digital service image and generate image is of the title designed for display on the local host and/or for transmission to a remote host.

Preferably, the generation module titles read dot-matrix images of all the characters and combined dot-matrix image with a transparent background in accordance with the location of the display and content titles, selected on the control level, after receiving the above information about the titles from the control level.

Preferably, the module overlay titles was located at the site of the codec (coder-decoder, CODEC) before module CODEC image; a generation module titles was located in the node CODEC and was connected to the module overlay titles.

Preferably, the module overlay titles contained the first module to overlay titles and the second module to overlay titles, and the generation module titles contained the first generation module titles and the second generation module titles; and the first module to overlay titles were in the encoder and was localized in the service channel, which is in front of the module, the image encoding;

the first generation module titles were in the encoder and was connected with the first module to overlay titles;

the second module overlay captions located in the decoder and was localized in the service channel, located behind the module decoding the image;

the second fashion is generate captions located in the decoder and was connected with the second module to overlay titles. The second generation module titles located in the decoder and is connected with the second module add captions.

The advantages of the present invention:

1. As the title generator is replaced by a program to overlay titles, it is obvious that a reduced amount of involved hardware and system cost.

2. Image credits generated only during the show on the first frame; for all other subsequent frames with the same title, you only need to follow a simple procedure to overlay titles; there is no need to scan the image of each frame, so the process is accelerating, especially in a situation full screen image caption.

3. Because the title is superimposed and service the picture is mixed for the transmission of images with captions, using this method, even foreign terminals can properly display Chinese subtitles.

4. Program overlay titles installed on the platform of technical equipment for video conferencing, so you can easily choose whether to produce the imposition on the local host or on a remote host. Eliminates the disadvantage at which it was impossible to translate the titles to display on the remote host.

BRIEF DESCRIPTION of DRAWINGS

Figure 1 shows the known device overlay titles and connection with what Stamou video conferencing.

Figure 2 presents a schematic diagram of a method of overlay titles according to this invention.

Figure 3 presents an embodiment of the present invention, implemented on the platform of a single digital signal processor (digital signal processor, DSP).

4 shows an embodiment of the present invention, implemented on a platform with two digital signal processors (digital signal processor, DSP).

EMBODIMENTS of the PRESENT INVENTION

The invention will be described in more detail with reference to the drawings and examples of implementation.

In the scheme shown in Figure 2, image titles, generate software generation module titles and use the switch to transmit, respectively, at node overlay titles encoder or a node in the overlay caption decoder. When choosing a local host switch connected to the decoder, image titles through the switch arrives at the node overlay caption decoder; then image credits applied to the decoded with decoder service image and the resulting mixed image is sent to the TV for display. When selecting the remote host to the switch connect to the encoder, image titles through the send switch for node overlay titles encoder; then image titles put on coming from the camera image, then obtained the image bearing the title passed to the encoder for encoding then send in the transmitting channel to broadcast a remote host.

To obtain credits, completed with a beautiful big font, when generating the title using the database of vector symbols, rather than the traditional database bitmap symbols. In accordance with the requirements of the chosen font characters (can be used any vector font of the Windows operating system used by management level) and the size of characters, the characters one after the other display PC using the software, then the resulting image is recorded as dot-matrix image and save in native format, creating a database file of characters. Using this method, by changing just a few parameters, you can create a database of characters with characters of various fonts and sizes.

Color image titles can be directly modified in accordance with the colors chosen on the management level, however, the background image title remains transparent. When the colors of the titles are defined at the management level, you can choose from a palette of colors, with a wide choice of colours. Software that allows you to change the color of the subtitles, easy to use and easy to configure.

Setting information about the internal codes and colors of titles, level control pasalamat information in a software module to overlay titles. In accordance with the number and size imposed by title software module to overlay titles initially generates an image in YUV420 format, the size of which corresponds exactly to the size of the titles, and fills it with a transparent color. Then, in accordance with point matrix image content titles, and given flowers software module to overlay titles has a point on the image in a specific order, creating a color image title on a transparent background. The obtained dot-matrix image captions superimposed on the input or output digital image. Obviously, the image generation titles required only when displaying a first frame; for subsequent frames required to perform only a simple overlay; no need to scan a dot matrix image captions for each frame. Therefore, the processing is accelerated; this method is especially important when a full-screen titles. Given the combination of service images bearing the title, is made in the present invention, the Chinese titles (including places for meetings in China) can be displayed on a foreign terminal.

When a software module to overlay titles executes the procedure to overlay titles, the procedure of blending may be performed either on the local host or on-the nom site. When you choose the local node, image titles send to the decoder; the decoder imposes image titles on the decoded image, and then generates the output blended image intended for display on TVs. When choosing a remote host image titles send to the encoder; the encoder causes the image titles on the service image, encodes the mixed images with captions and sends to the remote host so that the captions can be displayed on the remote terminal.

Figure 3 shows the block diagram of the video conference terminal on the platform of a single digital signal processor (Digital Signal Processor, DSP), using the program overlay titles, and figure 4 shows the block diagram of the video conference terminal on the two blocks DSPs using the program overlay titles. The basic principle is the same. Figure 3 and Figure 4 does not show the nodes for processing audio and video data, because they do not belong to the present invention.

In the case of a platform with a single DSP coding and decoding is realized by one DSP, and using the platform for two DSP, coding and decoding are carried out, respectively, the two DSPs.

The above reveals that only a specific embodiment of the present invention and does not restrict the scope of the invention. Any modification, replacement and Ulu is the decisions and so on, the spirit and principles of the present invention, included in the paragraphs following claims.

1. How to overlay titles used in the interactive video equipment, in which the level control interactive video equipment receives user-defined information about the titles that you want to generate, and the method comprises the following steps performed in the encoder interactive video equipment on the sending node:

A. obtaining information about the titles from the control level and the subsequent generation of image titles on a transparent background in accordance with the specified approved information;

C. the imposition of the specified image titles on the digital service image before encoding, sent from the transmitting node, receiving the digital image, the mixed image titles, and encoding the hybrid digital image with its subsequent transfer to the remote host.

2. The method according to claim 1, wherein the information about the titles that you want to generate, includes internal codes of all characters, titles, location information of a title, information about the size of the credits and information about the color of the caption.

3. The method according to claim 1, wherein the information about the titles that you want to generate, includes internal codes of all SIM the tins titles, you want to generate, and internal codes generated in the following sequence:

use software to generate a database of characters; choose a vector font; in accordance with the required size of the symbols display symbols one by one on the monitor using the software then writes the result display in the form of dot-matrix and save this image as dot-matrix in the typical format as the database file of characters.

4. The method according to claim 1, wherein the information about the titles that you want to generate, includes information on color of title; this stage And further includes the installation or change the color of characters in accordance with the information about the color of the titles and supports background image title transparent.

5. The method according to claim 1, in which stage And includes reading dot matrix images of all characters and combining dot matrix images with a transparent background in accordance with the location and content titles, selected on the control level after the generation module titles will receive from the control level specified information about the titles.

6. The method according to claim 1, in which stage is the imposition of only the first frame of the image titles on subsequent digital with wisnae image before encoding, if the new information necessary to generate the title is not supplied.

7. How to overlay titles used in the interactive video equipment, in which the level control interactive video equipment receives user-defined information about the titles that you want to generate, and the method comprises the following steps performed in the decoder interactive video receiving site:

A. obtaining information about the titles from the control level and the subsequent generation of image titles on a transparent background in accordance with the specified approved information;

C. decoding digital service image received from a remote node, the imposition of the specified image titles on this decoded digital service image obtaining digital images, mixed with image captions, and subsequent display on the receiving node.

8. The method according to claim 7, in which information about the titles that you want to generate, includes internal codes of all characters, titles, location information of a title, information about the size of the credits and information about the color of the caption.

9. The method according to claim 7, in which information about the titles that you want to generate, includes internal codes of all characters of the titles that you want to Shiner is to be encoded, moreover, internal codes generated in the following sequence:

use software to generate a database of characters; choose a vector font; in accordance with the required size of the symbols display symbols one by one on the monitor using the software then writes the result display in the form of dot-matrix and save this image as dot-matrix in the typical format as the database file of characters.

10. The method according to claim 7, in which information about the titles that you want to generate, includes information about the color of the titles in this stage And further includes the installation or change the color of characters in accordance with the information about the color of the titles and supports background image title transparent.

11. The method according to claim 7, in which the phase And includes reading dot matrix images of all characters and combining dot matrix images with a transparent background in accordance with the location and content titles, selected on the control level after the generation module titles will receive from the control level specified information about the titles.

12. The method according to claim 7, in which at the stage by imposing only the first frame of the image titles on subsequent digital service image to Kadirova the Oia, if the new information necessary to generate the title is not supplied.



 

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