CN1324882C - Method for adjusting sub-image display in audio-visual playing device - Google Patents

Abstract

A method for adjusting sub-picture display in video and audio playing device provides a set of sub-picture adjusting parameters to adjust the sub-picture display format, which includes providing a sub-picture position adjusting parameter to adjust the sub-picture display position or providing a sub-picture size adjusting parameter to adjust the sub-picture display size. The invention can set the sub-image adjusting parameters by the input device of the video-audio playing device, and the video-audio playing device system can judge, adjust and display the sub-image according to the sub-image adjusting parameters.

Description

Method for adjusting sub-image display in audio-visual playing device

technical field

The invention relates to a method for adjusting display in an audio-visual playing device, in particular to a method for adjusting a display format of a subpicture in an audio-visual playing device.

Background technique

For a long time, storage media has played an indispensable role in audio-visual systems. Therefore, the scientific and technological community has continuously invested in the research of storage media, and has also made great progress. This is not limited to the types of storage media, but also includes its stability. performance and storage capacity. Recently, due to the advantages of high stability and high storage capacity of optical discs, various optical disc products with different characteristics are constantly being introduced, and their application scope is becoming more and more popular. For example, the disc for storing video data has also evolved from VCD (Video Compact Disc, referred to as VCD) to DVD (Digita1 Versatile Disc, referred to as DVD) disc with larger capacity to store high-quality video images.

Taking the DVD-VIDEO specification as an example, it uses the MPEG-2 dynamic image compression format, and each frame can reach 720×480 (NTSC) or 720×576 (PAL) pixels, and at least Provide high-quality video services at a frame rate of more than 25 frames per second. However, in the DVD laser video disc specification, in order to enable digital content and users to have a considerable degree of interaction, more planning Mechanism for subpictures. Please refer to FIG. 1 , which is a schematic diagram of a display screen output by a current DVD player, which includes a display screen 110 and a sub-image 120 . DVD laser video disc can support up to 32 subpicture streams (subpicture stream), which is convenient for digital content providers to design various menus, marks, hearing aids, simple animations, and subtitles supported by multiple languages. For the purpose of simplifying the explanation, those skilled in the art can understand that a subpicture can basically be regarded as a series of compressed bitmaps. The image and other data to be displayed are integrated and displayed. For example, a digital content provider can make a subtitle bitmap based on a video content, and the video and the subtitle pattern are respectively encoded in MPEG-2 and sub-image according to the DVD laser disc standard. The format is compressed, and when playing, the player can timely paste the subtitle image on the preset position of the sub-image data on the movie screen according to the pre-recorded data in the disc, so as to achieve the effect of movie subtitles. About subpicture (subpicture), subtitle (subtit1e), film content, and DVD laser video disk making etc., all are well known by those skilled in the art, so will not repeat them here.

Please refer to FIG. 2 , which shows a flowchart of a method for displaying sub-images in the prior art. In order to simplify the description, only the subpicture processing flow is described here, and other devices and processes related to the audio-visual playback device are familiar to those skilled in the art, so they will not be repeated here. In step 210, the audio-visual playing device reads and decodes the sub-image data from the optical disc, and converts the sub-image data into dot-matrix image data that can be output and displayed. Next, in step 220, according to the time and position parameters corresponding to the sub-image, it is integrated with other data to be displayed into a time-related frame (frame). Generally speaking, other data to be displayed includes decoded moving image data or still image data, etc. Finally, the time-related frames are transmitted to the display device according to their sequence and frame rate, as a display output.

However, because individuals have different habits and preferences when viewing audio-visual data, or the sub-images are improperly arranged when DVD laser discs are produced, users will be troubled. When using laser video disc production, the subtitle format is used to display subtitles, so that the position and size of the displayed subtitles are fixed, especially when a 16:9 ratio movie is played on a general 4:3 TV screen, the TV screen Therefore, there are often two areas without display data at the top and bottom of the subtitle, but the subtitle design is often still placed in the visible area of the movie. At this time, not only cannot use these display areas without display data, but also for viewing For video users, if the position of the subtitle is inappropriate, the size of the subtitle is too large or too small, so as to interfere with the wonderful picture and hinder the viewing of the video, they can only bear it silently and cannot change it at will. Demand for high-quality products.

Contents of the invention

In view of this, the present invention provides a method for adjusting the display of a subpicture in an audio-visual playback device, which can adjust the size and position of the displayed subpicture according to the actual needs of the user. One of the purposes is Adjust the size and position of subtitles, which is very convenient for users to use.

The method for adjusting the display of a subpicture in an audio-visual playback device of the present invention includes firstly reading and decoding a subpicture data, and then providing a set of "subpicture adjustment parameters" to determine and confirm a subpicture to be adjusted , and then adjust the display format of the sub-image to be adjusted according to the sub-image adjustment parameter. The sub-image adjustment parameter may include a sub-image “position” adjustment parameter. If the adjusted position indicated by the parameter is different from the preset position, the sub-image position is adjusted according to the sub-image position adjustment parameter; in addition, the sub-image The sub-image adjustment parameters may include a sub-image "size" adjustment parameter. If the adjusted size indicated by the parameter is different from the preset size, the sub-image size is adjusted according to the sub-image size adjustment parameter. Finally, the adjusted sub-image is integrated with other data to be displayed and then output to the display to complete the adjustment of the sub-image.

Wherein, the sub-image adjustment parameters include a sub-image position parameter to be adjusted, a sub-image position adjustment parameter and a sub-image size adjustment parameter, these parameters can be selected by the user through the input device of the audio-visual playback device to select a preset parameter combination, Or use the input device of the audio-visual player to select the area of the display screen to set it.

Brief description of the drawings

FIG. 1 is a schematic diagram illustrating sub-image display of an audio-visual playback device in the prior art.

FIG. 2 is a flow chart showing a sub-image display method of an audio-visual playback device according to the known technology.

FIG. 3 is a flowchart showing a method for adjusting sub-image display of an audio-visual playback device according to a preferred embodiment of the present invention.

4(A) to (B) are diagrams respectively illustrating the position and size adjustment of the sub-image in the audio-visual playing device according to an embodiment of the present invention.

FIG. 5 is a schematic diagram illustrating simultaneous position and size adjustment of sub-images according to an embodiment of the present invention.

Description of reference symbols

110 display screen 120 sub-image

410 display screen 420 atomic image

430 Adjusted sub-image 460 Display screen

470 Atomic image 480 Adjusted sub-image

510 display screen 520 atomic image

530 Adjusted sub-image

Detailed ways

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

Please refer to FIG. 3 , which is a flowchart of a method for adjusting subpicture display in an audio-visual playback device according to a preferred embodiment of the present invention. At step 310, as shown in step 210 in the prior art, the audio-visual playback device reads and decodes the sub-image data from the optical disc, and converts the sub-image data into dot matrix image data that can be output and displayed. In addition, a set of "sub-image adjustment parameters" is provided and input (step 350), which includes a "sub-image position parameter to be adjusted" and other sub-image adjustment parameters such as the position or size of the sub-image. Then, in step 320, it is determined whether to adjust the read sub-image according to the "sub-image position parameter to be adjusted". The position parameter of the sub-image to be adjusted can be marked by two sets of coordinates, for example, the coordinates of the upper-left corner and the coordinate of the lower-right corner of the corresponding rectangular display area of the sub-image on the display screen, and then the audio-visual playback device judges whether it overlaps with the current sub-image It can also be a sub-picture number (for example: 0-31), and all sub-pictures belonging to this number after decoding are adjusted.

In addition, for the region to be adjusted, the playback device further considers other parameters in the group of sub-image adjustment parameters except the sub-image position parameter to be adjusted. In some embodiments, the sub-image adjustment parameter also includes a "sub-image position adjustment parameter"; in other embodiments, the sub-image adjustment parameter also includes a "sub-image size adjustment parameter". In an example, the above two types of adjustment parameters may be included together. In step 320, if the adjusted position or size indicated by the sub-image adjustment parameter is the same as the preset position or size, it is determined that no adjustment is required. If the sub-image is determined not to be adjusted, then directly proceed to step 340, where the sub-image is integrated with other data to be displayed and then output. In this state, the execution method is similar to the known technology.

At step 330, because the adjusted position or size shown by the sub-image adjustment parameter is different from the preset position or size, the sub-image position or size is adjusted according to the sub-image position adjustment parameter, and then in step 340 Output the sub-image after integrating it with other data to be displayed. The sub-image adjustment can be implemented by executing firmware, or by logic circuits. When the audio-visual playback device is initially turned on, these sub-picture adjustment parameters can be loaded with previously stored values, or the sub-picture decoding data of individual optical discs can be used as initial values. In addition, in the disclosed embodiments of the present invention, for the sake of simplicity of description, only the adjustment of a single sub-image is described. However, those skilled in the art can understand that in an audio-visual playback device system, there is no limit to only one group of sub-images For adjusting parameters, take DVD laser disc as an example, because its specification supports up to 32 sub-pictures, so a player capable of playing DVD laser disc can implement 32 sets of sub-picture adjustment parameters corresponding to each sub-picture.

Please refer to FIG. 4(A), which is a schematic diagram for illustrating the sub-image position adjustment of the audio-visual playback device according to an embodiment of the present invention. A user intends to translate an atomic image 420 in the display frame 410 into an adjusted sub-image 430, wherein the position of the atomic image 420 is obtained by decoding the original sub-image data. In one embodiment, the position of the sub-image is marked by two sets of coordinates to mark the diagonal coordinates of the sub-image on the display screen corresponding to the rectangular display area, that is, the two ends of a diagonal line of the rectangular display area such as the coordinates of the upper left corner and The coordinates of the lower right corner, and the sub-image position adjustment parameters include an original position parameter and a target position parameter, which can respectively record an original upper left coordinate, an original lower right coordinate and an object upper left coordinate, so that the audio-visual playback device can Select the sub-image in the rectangular area according to the original position for adjustment, compare the original position with the target position, and adjust the sub-image to the target position; in some embodiments, the sub-image position adjustment parameters are stored in the audio-visual playback device volatile or nonvolatile memory.

Please refer to FIG. 4(B), which is a schematic diagram for illustrating the sub-image size adjustment of an audio-visual playback device according to an embodiment of the present invention. A user wants to enlarge or reduce the size of an atomic image 470 in the display frame 460 to make it an adjusted sub-image 480, wherein the size of the atomic image 470 is obtained by decoding the original sub-image data. In one embodiment, the sub-image resizing parameter is a floating-point number used to record the display ratio relative to the original sub-image, while in some other embodiments, the sub-image resizing parameter includes two sets of floating-point numbers, respectively Indicates the horizontal and vertical display ratios of the sub-image, so the audio-visual playback device can perform interpolation point enlargement or sampling reduction on the sub-image according to the size adjustment parameter, so as to achieve the purpose of size adjustment; in some embodiments, The sub-image size adjustment parameters are stored in the volatile or non-volatile memory of the audio-visual playing device.

Please refer to FIG. 5 , which is a schematic diagram illustrating simultaneous adjustment of the position and size of the sub-image according to an embodiment of the present invention. The sub-image adjustment parameters may also include sub-image position adjustment parameters and sub-image size adjustment parameters at the same time, and the adjustment method may use the above-mentioned position and size adjustment methods. For example, in a display frame 510, if the atomic image 520 is to be adjusted to the position and size shown in 530, the atomic image 520 may be resized first, and then the resized sub-image may be shifted in its position; It is also possible to adjust the position of the atom image 520 first, and then perform the zoom-in or zoom-out operation at the new position.

In addition, in order to achieve the above calculation of adjusting the position and size, a group of sub-image adjustment parameters provided by the audio-visual playback device can be built-in default values, or can be adjusted by the user according to the actual needs of the user. Therefore, the player It is necessary to provide the user with a setting method for setting sub-image adjustment parameters such as sub-image position parameters to be adjusted, sub-image position adjustment parameters, or sub-image size adjustment parameters in the audio-visual playback device, so as to adjust the display on the display screen of the audio-visual playback device The format of the subimage.

Regarding the selection of sub-image position parameters to be adjusted, the selected method can be to select the diagonal coordinates of a rectangular display area, that is, the two ends of the diagonal line of the rectangular display area such as the upper left corner and the lower right corner coordinates. select. Since there may be more than one sub-image displayed on the display screen at the same time, selecting a square window with the coordinates of the upper left corner and the lower right corner can more clearly mark the target sub-image to be adjusted without affecting to other sub-images that do not want to be changed; in addition, the selection method can also be that the audio-visual playback device actively uses a sub-image area to use visual effects (such as framed or highlighted) to indicate the currently active sub-image, the user Then, the input device (for example, the arrow keys on the remote controller) of the audio-visual playing device can be used to switch and select among the sub-images.

In addition, in terms of setting the sub-image position adjustment parameters, it is possible to use the input device of the audio-visual playing device, such as the direction keys on the remote control to dynamically move the selected rectangular display area, for example, each time the direction keys are pressed, the The rectangular display area moves a fixed distance along with the direction of the direction key, and the user operates the direction key according to the moving distance and direction of the desired sub-image, so that the sub-image can be displayed at the desired position. For example, in order to quickly move the sub-image to the desired position, the user can directly move the cursor to select the position of the rectangular display area, or directly input the coordinate values of the rectangular display area to move the rectangular display area quickly to the desired position, thus saving the user's operating time.

In addition, in terms of setting sub-image size adjustment parameters, you can use the arrow keys to dynamically adjust the size of the rectangular display area. Fixed ratio so that the displayed subimage can be resized incrementally. However, in order to quickly adjust the sub-image to the desired size, the user can directly input the display ratio of the rectangular display area, or from a preset such as 1/4 times, 1/2 times, 2 times or Among multiple fixed display ratios such as 4 times, select the display ratio of a rectangular display area to quickly adjust the size of the required sub-image display; Automatically calculate the aspect ratio for resizing.

In the above-mentioned embodiment of the present invention, this method is applied to the subtitle display at the bottom of the display screen, so only one set of sub-image adjustment parameters is implemented; Subtitles, or even other menus, markers, hearing aids, and simple animations provided by the sub-image specification, will implement multiple sets of independent sub-image adjustment parameters to allow users to implement different sub-images for different regions. Image adjustment.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore The scope of protection of the present invention should be defined by the scope of the appended patent application.

Claims (7)

1. A method for adjusting a sub-image data display in an audio-visual playback device, the method comprising: Provide a set of sub-image adjustment parameters, wherein the set of sub-image adjustment parameters includes a sub-image position parameter to be adjusted and at least one sub-image display format adjustment parameter, the set of sub-image adjustment parameters is user-defined, and the sub-image display format The adjustment parameters include a sub-image size adjustment parameter; confirming that the sub-image is a sub-image to be adjusted according to the position parameter of the sub-image to be adjusted; and The display format of the sub-image to be adjusted is adjusted according to the set of sub-image adjustment parameters. 2. The method for adjusting the display of a sub-image data as claimed in claim 1, wherein the position parameter of the sub-image to be adjusted includes coordinates of two ends of at least one diagonal line of a rectangular display area. 3. The method for adjusting the display of a sub-image data as claimed in claim 1, wherein the sub-image display format adjustment parameter comprises a sub-image position adjustment parameter. 4. The method for adjusting the display of a sub-image data according to claim 3, wherein adjusting the display format of the sub-image to be adjusted is adjusting the position of the sub-image to be adjusted according to the sub-image position adjustment parameter. 5. The method for adjusting a display of sub-image data as claimed in claim 3, wherein the sub-image position adjustment parameters include an original position parameter and a target position parameter. 6. The method for adjusting the display of a sub-image data according to claim 1, wherein adjusting the display format of the sub-image to be adjusted is adjusting the size of the sub-image to be adjusted according to the sub-image size adjustment parameter. 7. The method for adjusting the display of a sub-image data as claimed in claim 2, wherein the sub-image is a subtitle frame.

Images