CN110740372B - Subtitle display method, device and equipment - Google Patents

Subtitle display method, device and equipment Download PDF

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Publication number
CN110740372B
CN110740372B CN201910989731.6A CN201910989731A CN110740372B CN 110740372 B CN110740372 B CN 110740372B CN 201910989731 A CN201910989731 A CN 201910989731A CN 110740372 B CN110740372 B CN 110740372B
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target
subtitle
pixel point
displayed
transparency
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CN110740372A (en
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李泉
何营昊
鲁好锦
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Hisense Visual Technology Co Ltd
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Hisense Visual Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4318—Generation of visual interfaces for content selection or interaction; Content or additional data rendering by altering the content in the rendering process, e.g. blanking, blurring or masking an image region
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/488—Data services, e.g. news ticker
    • H04N21/4884—Data services, e.g. news ticker for displaying subtitles

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Controls And Circuits For Display Device (AREA)
  • User Interface Of Digital Computer (AREA)
  • Studio Circuits (AREA)

Abstract

The embodiment of the invention provides a method, a device and equipment for displaying a caption, wherein after receiving bitmap data of the caption to be displayed, including the position and transparency of each pixel point in the caption to be displayed, the caption display equipment does not directly display each pixel point in the caption to be displayed, but determines a target starting position and a target ending position which meet transparency conditions according to the transparency of each pixel point in the caption to be displayed, screens the pixel points in the caption to be displayed through the target starting position and the target ending position to determine target pixel points with coordinate positions between the target starting position and the target ending position, and then displays the target caption corresponding to the target pixel points, so that the data volume of caption display can be effectively reduced, and the probability of incomplete caption data display is reduced to a certain extent.

Description

Subtitle display method, device and equipment
Technical Field
The invention relates to the technical field of smart televisions, in particular to a subtitle display method, device and equipment.
Background
With the continuous development of digital technology, some digital television programs are provided with subtitle information corresponding to the programs for users to watch conveniently. However, because the chip platforms adopted by the existing digital televisions are different, the compiling tool chains supported by different chip platforms are different, such as: the method comprises the steps that an android compiling tool chain is supported by a chip platform of one brand television or a Linux compiling tool chain is supported by the chip platform of one brand television, and the two compiling tool chains are different in corresponding processing modes when caption data are displayed.
In the prior art, when displaying caption data, in order to unify software implementation schemes, it is not necessary to distinguish whether an android compiling tool chain or a linux compiling tool chain, and the same caption display mode is adopted, the displayed caption data needs to be transmitted from a binder server end of a digital television to a binder client end of the digital television, that is, after the binder server end acquires the caption data to be displayed, the caption data to be displayed needs to be transmitted to the binder client end through transmission resources, so that the binder client end transmits the caption data to be displayed to a whole machine layer of the digital television, the whole machine layer transmits a Render of the digital television for caption drawing, and then the caption data is displayed through a screen of the digital television.
However, when the amount of the subtitle data to be displayed is large, or when a plurality of subtitles are to be displayed in a short time, the subtitle data is not fully displayed due to the rate limit of the binder data transmission, and therefore, how to reduce the probability that the subtitle data is not fully displayed in the subtitle data displaying process is an urgent problem to be solved by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a method, a device and equipment for displaying subtitles, which can reduce the probability of incomplete subtitle data display to a certain extent in the process of displaying subtitle data.
In a first aspect, an embodiment of the present invention provides a method for displaying a subtitle, where the method is applied to a subtitle display device, and the method for displaying a subtitle may include:
acquiring bitmap data of a subtitle to be displayed; the bitmap data comprises the positions and the transparencies of all pixel points in the subtitles to be displayed;
determining a target initial position and a target termination position which meet transparency conditions according to the transparency of each pixel point in the subtitle to be displayed, and determining a target pixel point of which the coordinate position is between the target initial position and the target termination position in each pixel point in the subtitle to be displayed;
and displaying the target caption corresponding to the target pixel point.
In one possible implementation, the transparency condition includes that the transparency is less than a preset threshold.
In a possible implementation manner, the bitmap data further includes colors of pixels in the subtitles to be displayed, and the displaying of the target subtitles corresponding to the target pixels includes:
obtaining a target caption corresponding to the target pixel point according to the color and the transparency corresponding to the target pixel point;
and displaying the target caption corresponding to the target pixel point.
In a possible implementation manner, the obtaining a target subtitle corresponding to the target pixel point according to the color and the transparency corresponding to the target pixel point includes:
the server side of the subtitle display equipment determines a target index value of the palette data corresponding to the color and the transparency corresponding to the target pixel point;
the server side of the subtitle display equipment sends the target index value to the client side of the subtitle display equipment;
the client of the subtitle display equipment obtains the color and the transparency corresponding to the target pixel point according to the target index value and the palette data;
and the client of the subtitle display equipment obtains the target subtitle corresponding to the target pixel point according to the color and the transparency corresponding to the target pixel point.
In a possible implementation manner, the method for displaying the subtitles may further include:
and the server side of the subtitle display equipment sends the palette data to the client side of the subtitle display equipment.
In a possible implementation manner, the determining, according to the transparency of each pixel point in the subtitle to be displayed, a start position and an end position that satisfy a transparency condition includes:
dividing the subtitle to be displayed into N equal parts in the height direction through N +1 parallel lines according to the height of the subtitle to be displayed;
determining an initial position and an end position corresponding to each parallel line according to the transparency of each pixel point on each parallel line in the N +1 parallel lines;
and determining the target starting position according to the starting position corresponding to each parallel line, and determining the target ending position according to the ending position corresponding to each parallel line.
In a possible implementation manner, the determining the target starting position according to the starting position corresponding to each parallel line, and determining the target ending position according to the ending position corresponding to each parallel line includes:
determining the most front initial position in the initial positions corresponding to the N +1 parallel lines according to the initial positions corresponding to the parallel lines, and determining the target initial position according to the most front initial position;
and determining the rearmost termination position in the termination positions corresponding to the N +1 parallel lines according to the termination positions corresponding to the parallel lines, and determining the target termination position according to the rearmost termination position.
In a possible implementation manner, the determining, according to the transparency of each pixel point on each of the N +1 parallel lines, an initial position and an end position corresponding to each parallel line includes:
traversing the transparency of each pixel point on a first parallel line according to the display sequence of the subtitles to be displayed, determining the position of the first pixel point meeting the transparency condition in each pixel point on the first parallel line as the initial position corresponding to the first parallel line, and determining the position of the last pixel point meeting the transparency condition as the end position corresponding to the first parallel line; wherein, the first parallel line is any one of the N +1 parallel lines.
In a second aspect, an embodiment of the present invention further provides a device for displaying subtitles, which is applied to a subtitle display apparatus, where the device for displaying subtitles may include:
the system comprises an acquisition unit, a display unit and a display unit, wherein the acquisition unit is used for acquiring bitmap data of a subtitle to be displayed; the bitmap data comprises the positions and the transparencies of all pixel points in the subtitles to be displayed;
the processing unit is used for determining a target initial position and a target termination position which meet transparency conditions according to the transparency of each pixel point in the subtitle to be displayed, and determining a target pixel point of which the coordinate position is between the target initial position and the target termination position in each pixel point in the subtitle to be displayed;
and the display unit is used for displaying the target caption corresponding to the target pixel point.
In one possible implementation, the transparency condition includes that the transparency is less than a preset threshold.
In a possible implementation manner, the bitmap data further includes colors of each pixel point in the subtitle to be displayed;
the processing unit is further configured to obtain a target subtitle corresponding to the target pixel point according to the color and the transparency corresponding to the target pixel point;
and the display unit is used for displaying the target caption corresponding to the target pixel point.
In a possible implementation manner, the processing unit includes a server of the subtitle display device and a client of the subtitle display device;
the server of the subtitle display device is used for determining a target index value of the palette data corresponding to the color and the transparency corresponding to the target pixel point; sending the target index value to a client of the subtitle display equipment;
the client of the subtitle display device is used for obtaining the color and the transparency corresponding to the target pixel point according to the target index value and the palette data; and obtaining the target caption corresponding to the target pixel point according to the color and the transparency corresponding to the target pixel point.
In a possible implementation manner, the server of the subtitle display apparatus is further configured to send the palette data to the client of the subtitle display apparatus.
In a possible implementation manner, the processing unit is specifically configured to divide the subtitles to be displayed into N equal parts in the height direction by N +1 parallel lines according to the height of the subtitles to be displayed; determining an initial position and an end position corresponding to each parallel line according to the transparency of each pixel point on each parallel line in the N +1 parallel lines; and determining the target starting position according to the starting position corresponding to each parallel line, and determining the target ending position according to the ending position corresponding to each parallel line.
In a possible implementation manner, the processing unit is specifically configured to determine, according to the starting position corresponding to each parallel line, a most anterior starting position in the starting positions corresponding to the N +1 parallel lines, and determine the target starting position according to the most anterior starting position; and determining the rearmost termination position in the termination positions corresponding to the N +1 parallel lines according to the termination positions corresponding to the parallel lines, and determining the target termination position according to the rearmost termination position.
In a possible implementation manner, the processing unit is specifically configured to traverse the transparency of each pixel point on the first parallel line according to the display sequence of the subtitles to be displayed, determine, among the pixel points on the first parallel line, a position of a first pixel point that meets a transparency condition as an initial position corresponding to the first parallel line, and determine a position of a last pixel point that meets the transparency condition as an end position corresponding to the first parallel line; wherein, the first parallel line is any one of the N +1 parallel lines.
In a third aspect, an embodiment of the present invention further provides a device for displaying subtitles, where the device for displaying subtitles may include a memory and a processor;
a memory for storing a computer program;
and a processor configured to read the computer program stored in the memory, and execute the subtitle display method according to any one of the first aspect.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions, and when a processor executes the computer-executable instructions, the method for displaying a subtitle according to any one of the above first aspects is implemented.
According to the method, the device and the equipment for displaying the caption, provided by the embodiment of the invention, after receiving bitmap data of the caption to be displayed, which comprises the position and the transparency of each pixel point in the caption to be displayed, the caption display equipment does not directly display each pixel point in the caption to be displayed, but determines a target starting position and a target ending position which meet transparency conditions according to the transparency of each pixel point in the caption to be displayed, screens the pixel points in the caption to be displayed through the target starting position and the target ending position to determine target pixel points with coordinate positions between the target starting position and the target ending position, and then displays the target caption corresponding to the target pixel points, so that the data volume of caption display can be effectively reduced, and the probability of incomplete caption data display is reduced to a certain extent.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic diagram of an application scenario provided in an embodiment of the present invention;
fig. 2 is a schematic flowchart of a subtitle display method according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of another subtitle displaying method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a subtitle to be displayed according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a subtitle display apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a subtitle display apparatus according to an embodiment of the present invention.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the description of the present invention, the character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Fig. 1 is a schematic diagram of an application scenario provided by an embodiment of the present invention, for example, as shown in fig. 1, the application scenario may include an input device and a subtitle display device, after the input device (for example, a server or a controller) inputs subtitle data to be displayed to the subtitle display device, a server of the subtitle display device sends the received subtitle data to be displayed to a client of the subtitle display device through a binder, and when the amount of subtitle data to be displayed is large, or when a plurality of subtitles need to be displayed in a short time, a phenomenon that subtitle data is incompletely displayed may occur due to a rate limit of data transmission by the binder. In order to reduce the probability of incomplete subtitle data display to a certain extent in the subtitle data display process, the embodiment of the invention provides a subtitle display method, which is different from the prior art in that after receiving bitmap data of a subtitle to be displayed, wherein the bitmap data comprises the positions and the transparencies of all pixel points in the subtitle to be displayed, the subtitle display device does not directly display all the pixel points in the subtitle to be displayed, but firstly determines a target starting position and a target ending position which meet the transparency condition according to the transparencies of all the pixel points in the subtitle to be displayed, screens the pixel points in the subtitle to be displayed through the target starting position and the target ending position to determine target pixel points of which coordinate positions are between the target starting position and the target ending position, and then displays a target subtitle corresponding to the target pixel points, so that the subtitle data amount can be effectively reduced, therefore, the probability of incomplete subtitle data display is reduced to a certain extent. Typically, the target ending location is after the target starting location. For example, each pixel point in the subtitle to be displayed is distributed in the positive direction of the X axis, and then the coordinate of the target ending position on the X axis is larger than the coordinate of the target starting position on the X axis, that is, the coordinate of the target ending position on the X axis is on the right side of the coordinate of the target starting position on the X axis.
It is understood that the smaller the transparency, the lower the transparency when the subtitle is presented, and when the transparency is as small as 0, the subtitle is completely opaque when the subtitle is presented, and the subtitle can be clearly seen by the user. Conversely, the greater the transparency, the higher the transparency when the subtitle is presented, and when the transparency is as high as 100%, the user cannot see the subtitle when the subtitle is presented even though the subtitle is fully presented because the subtitle is fully transparent at the time of presentation. In view of the influence of the transparency on the caption display in the caption display process, in order to reduce the data volume of the caption to be displayed, each pixel point in the caption to be displayed can be screened according to the factor of the transparency, namely the transparency condition. Alternatively, the transparency condition may be that the transparency is less than a preset threshold. In this case, when the transparency is smaller than the preset threshold, the transparency does not affect the display of the subtitles, that is, the user can see the subtitles, and therefore, the target starting position and the target ending position of which the transparency is smaller than the preset threshold can be determined according to the transparency of each pixel point in the subtitles to be displayed. Conversely, when the transparency is greater than or equal to the preset threshold, the transparency may affect the display of the subtitle, and even if the subtitle is fully presented, the subtitle is not visible to the user because the subtitle is fully transparent at the time of presentation. For example, the preset threshold may be 100%, or may also be 99.5%, or may also be 99%, and may be specifically set according to actual needs, where the specific value of the preset threshold is not further limited in the embodiment of the present invention.
For example, the subtitle display apparatus may be a television, a notebook computer, a tablet computer, or another terminal having a subtitle display function, and the embodiment of the present invention is only described by taking the subtitle display apparatus as a television, a notebook computer, or a tablet computer as an example, but the embodiment of the present invention is not limited thereto.
The technical solutions provided by the embodiments of the present invention will be described in detail by several specific examples. It is to be understood that the following detailed description may be combined with certain embodiments, and that the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 2 is a schematic flowchart of a subtitle display method according to an embodiment of the present invention, and for example, please refer to fig. 2, the subtitle display method may include:
s201, obtaining bitmap data of the subtitle to be displayed.
The bitmap data comprises the positions and the transparencies of all pixel points in the subtitles to be displayed. For example, the position of each pixel point may be represented by coordinates. For example, the bitmap data may further include a color of each pixel point in the subtitle to be displayed, and the color of each pixel point may be represented by an RGB value of the pixel point.
Taking a caption to be displayed as a ' please see, which is a caption ' as an example, before caption display, the input device sends bitmap data of the caption to be displayed to the caption display device, the bitmap data comprises the caption to be displayed, which is the position and transparency of each pixel point in the caption ', namely the input device firstly sends the caption to be displayed, which is the position and transparency of each pixel point in the caption ' to the caption display device, so that the caption display device firstly obtains the caption to be displayed, which is the position and transparency of each pixel point in the caption '. Certainly, the bitmap data includes a caption "to be displayed, which is the color of each pixel point in the caption".
After the positions and the transparencies of the pixels in the caption to be displayed are obtained, different from the prior art, the caption display device does not directly display the caption to be displayed, which is the caption, but firstly screens the pixels in the caption to be displayed, which is the caption, according to the transparency factor, namely, the following S202 is executed:
s202, according to the transparency of each pixel point in the caption to be displayed, determining a target starting position and a target ending position which meet the transparency condition, and determining a target pixel point of which the coordinate position is between the target starting position and the target ending position in each pixel point in the caption to be displayed.
For example, when determining a target starting position and a target ending position which meet a transparency condition according to the transparency of each pixel point in a subtitle to be displayed, traversing the pixel points in the subtitle to be displayed according to the display sequence of the subtitle, finding out a pixel point in the subtitle to be displayed, where the first transparency is smaller than a preset threshold, determining the position of the pixel point as the target starting position, then continuing to traverse, finding out a pixel point in the subtitle to be displayed, where the last transparency is smaller than the preset threshold, and determining the position of the pixel point as the target ending position, thereby obtaining the target starting position and the target ending position which meet the transparency condition. The display sequence of the subtitles can be understood as the sequence of reading the subtitles by the user, for example, for the subtitle to be displayed, "please see, this is the subtitle", the display sequence is from left to right, that is, from the first Chinese character "please", the subtitles are displayed from left to right in sequence until the last Chinese character "subtitle" is displayed.
Certainly, when the target starting position and the target ending position meeting the transparency condition are determined according to the transparency of each pixel point in the subtitle to be displayed, the pixel points in the subtitle to be displayed can be traversed according to the reverse order of the display sequence of the subtitle, the pixel point of which the first transparency is smaller than the preset threshold value in the subtitle to be displayed is found out, the position of the pixel point is determined as the target starting position, then traversal is continued, the pixel point of which the last transparency is smaller than the preset threshold value in the subtitle to be displayed is found out, and the position of the pixel point is determined as the target ending position, so that the target starting position and the target ending position meeting the transparency condition are obtained. For example, for the subtitle to be displayed, "please see, this is the subtitle," the reverse order of its display sequence is from right to left, i.e., starting from the last chinese character "subtitle," and proceeding from right to left until the last chinese character "please.
It can be seen that when the target starting position and the target ending position meeting the transparency condition are determined according to the transparency of each pixel point in the subtitle to be displayed, for the traversal sequence, the target starting position and the target ending position meeting the transparency condition can be obtained no matter the pixel points in the subtitle to be displayed are traversed according to the display sequence of the subtitle or the pixel points in the subtitle to be displayed are traversed according to the reverse sequence of the display sequence of the subtitle. The difference is that the target initial position obtained when the pixels in the subtitle to be displayed are traversed according to the display sequence of the subtitle is the target end position obtained when the pixels in the subtitle to be displayed are traversed according to the reverse order of the display sequence of the subtitle, and the target end position obtained when the pixels in the subtitle to be displayed are traversed according to the display sequence of the subtitle is the target initial position obtained when the pixels in the subtitle to be displayed are traversed according to the reverse order of the display sequence of the subtitle.
After the target starting position and the target ending position which meet the transparency condition are respectively determined according to the transparency of each pixel point in the subtitle to be displayed, the target pixel points with the positions between the target starting position and the target ending position can be found according to the obtained positions of the pixel points in the subtitle to be displayed, and the transparency of the target pixel points is smaller, so that the subtitle corresponding to the target pixel point can be stored and displayed. And for the pixel points with the positions outside the target initial position and the target end position, the transparency of the pixel points is higher, and even though the subtitles corresponding to the pixel points are displayed, the subtitles can not be seen by a user, so that the pixel points can be deleted, and the subtitles corresponding to the pixel points do not need to be displayed when the subtitles are displayed.
Taking the caption to be displayed as an example, looking up the caption to be displayed, which is the caption, according to the display sequence of the caption, the pixels in the caption are traversed, if the transparency of each pixel in the pixels in the Chinese character looking up is greater than or equal to the preset threshold, the transparency of the pixels is larger, and even if the caption corresponding to the pixels is displayed, the user cannot see the caption, so that the pixel points are continuously traversed, and if the pixel point with the first transparency smaller than the preset threshold is the pixel point with the most front position in the Chinese character, the position of the pixel point with the most front position is determined as the target initial position. And then, continuously traversing to find out the last pixel point with the transparency smaller than a preset threshold value in the subtitles to be displayed, and if the last pixel point with the transparency smaller than the preset threshold value is the pixel point with the position closest to the rear position in the Chinese characters at dusk, determining the position of the pixel point as the target termination position. And then according to the position of each pixel point in the caption to be displayed, determining target pixel points with the positions between the target initial position and the target end position, wherein the target captions corresponding to the target pixel points are the captions.
After determining a target pixel point with a coordinate position between a target starting position and a target ending position in each pixel point in the subtitle to be displayed through the S202, a target subtitle corresponding to the target pixel point can be displayed, that is, the following S203 is executed:
and S203, displaying the target caption corresponding to the target pixel point.
It can be seen that, in the embodiment of the present invention, when the subtitle display apparatus displays the subtitles, unlike the prior art, in the embodiment of the present invention, the subtitle display apparatus does not directly display the subtitle to be displayed "please see, which is the subtitle", but screens the pixel points in the subtitle to be displayed "please see, which is the subtitle", according to the transparency of each pixel point, and only displays the target subtitle "which is the subtitle", of which the coordinate position corresponds to the target pixel point between the target start position and the target end position, which can effectively reduce the amount of subtitle data, thereby achieving a reduction in the probability of incomplete subtitle data display to a certain extent.
Based on the embodiment shown in fig. 2, when determining the target start position and the target end position that satisfy the transparency condition according to the transparency of each pixel point in the subtitle to be displayed, in a possible implementation manner, the subtitle display device may traverse each pixel point in each parallel line in the received subtitle to be displayed to obtain the start position and the end position that satisfy the transparency condition in each parallel line, and then determine the target start position and the target end position that satisfy the transparency condition according to the start position and the end position that satisfy the transparency condition in each parallel line. When the number of parallel lines included in the subtitle to be displayed is large, because each pixel point in each parallel line needs to be traversed, the subtitle display has time delay due to large data volume needing to be traversed, in another possible implementation mode, before each pixel point in each parallel line of the subtitle to be displayed is traversed, the subtitle display device can divide the subtitle to be displayed into N equal parts in the height direction through N +1 parallel lines according to the height of the subtitle to be displayed, then traverse each pixel point in each parallel line of the N +1 parallel lines to obtain an initial position and an end position which meet transparency conditions in each parallel line, and then determine a target initial position and a target end position which meet the transparency conditions according to the initial position and the end position which meet the transparency conditions in each parallel line, therefore, the traversal of each pixel point in each parallel line can be avoided, and the caption display time delay is reduced. It can be understood that the greater the value of N, the higher the accuracy of the corresponding obtained target start position and target end position. In the following, how to determine the target starting position and the target ending position according to the manner of equal division will be described in detail for a second possible implementation. For example, please refer to fig. 3, where fig. 3 is a schematic flowchart of another subtitle display method according to an embodiment of the present invention, and the subtitle display method may further include:
s301, dividing the subtitles to be displayed into N equal parts in the height direction through N +1 parallel lines according to the height of the subtitles to be displayed.
For example, N may be equal to 12 or equal to 6, which may be specifically set according to actual needs, and here, for the value of N, the embodiment of the present invention is not further limited.
It can be understood that, the subtitles to be displayed are divided in the height direction according to the height of the subtitles to be displayed, the subtitles to be displayed can be uniformly divided into N equal parts in the height direction, and certainly, the subtitles to be displayed can be non-uniformly divided into N equal parts in the height direction, here, the embodiment of the present invention is only described by dividing the subtitles to be displayed into N equal parts in the height direction through N +1 parallel lines, but the embodiment of the present invention is not limited thereto.
As an example, please refer to fig. 4, and fig. 4 is a schematic diagram of a subtitle to be displayed according to an embodiment of the present invention, it can be seen that, when dividing the subtitle to be displayed in the height direction, the subtitle to be displayed may be divided into 12 equal parts by 13 lines according to the height of the subtitle to be displayed, and then the start position and the end position corresponding to each parallel line are determined according to the transparency of each pixel point on each parallel line of the 13 parallel lines, that is, the following S302 is performed:
s302, determining the starting position and the ending position corresponding to each parallel line according to the transparency of each pixel point on each parallel line in the N +1 parallel lines.
For example, when determining the transparency of each pixel point on each of N +1 parallel lines and determining the start position and the end position corresponding to each parallel line, any one of the N +1 parallel lines, for example, the first parallel line, may be used as an example for description, and the determination manner of the start position and the end position of the other N parallel lines is similar to the determination manner of the start position and the end position of the first parallel line, and thus, details are not repeated in the embodiment of the present invention.
For example, when the starting position and the ending position of the first parallel line are determined, the transparency of each pixel point on the first parallel line may be traversed according to the display sequence of the subtitles to be displayed, a first pixel point whose transparency meets the transparency condition in the sequence direction is found, and the position of the first pixel point meeting the transparency condition is determined as the starting position corresponding to the first parallel line; and then, continuously traversing the pixel points on the first parallel line, finding out the last pixel point on the first parallel line, the transparency of which meets the transparency condition, and determining the position of the last pixel point meeting the transparency condition as the termination position corresponding to the first parallel line, thereby obtaining the starting position and the termination position corresponding to the first parallel line.
Certainly, when the starting position and the ending position of the first parallel line are determined, the transparency of each pixel point on the first parallel line can be traversed according to the reverse order of the display sequence of the subtitles to be displayed, a first pixel point with the transparency meeting the transparency condition in the reverse order direction is found, and the position of the first pixel point meeting the transparency condition is determined as the starting position corresponding to the first parallel line; and then, continuously traversing the pixel points on the first parallel line, finding out the last pixel point on the first parallel line, the transparency of which meets the transparency condition, and determining the position of the last pixel point meeting the transparency condition as the termination position corresponding to the first parallel line, thereby obtaining the starting position and the termination position corresponding to the first parallel line.
Referring to fig. 4, after determining the start position and the end position, that is, 13 initial positions and 13 end positions, corresponding to each of the 13 parallel lines in the subtitle "please see, that is, the subtitle" to be displayed, respectively, the following S303 may be performed:
s303, determining a target starting position according to the starting position corresponding to each parallel line, and determining a target ending position according to the ending position corresponding to each parallel line.
Optionally, when the target starting position is determined according to the starting position corresponding to each parallel line, and the target ending position is determined according to the ending position corresponding to each parallel line, the starting positions corresponding to each parallel line may be compared to find the most advanced starting position in the starting positions corresponding to the N +1 parallel lines, and the target starting position is determined according to the most advanced starting position; and comparing the termination positions corresponding to the parallel lines, finding the rearmost termination position in the starting positions corresponding to the N +1 parallel lines, and determining the target termination position according to the rearmost termination position.
In the embodiment of the present invention, the target start position is determined based on the most forward start position, which may be directly determined as the target start position, or may be determined as the most forward start position, and a point is moved forward, and a point further forward after the movement is determined as the target start position. It can be seen that, the position closer to the front after the movement is determined as the target starting position, and compared with the method of directly determining the starting position closest to the front as the target starting position, although the amount of the subtitle data to be displayed is increased, some pixel points to be displayed are prevented from being missed, so that the accuracy of subtitle display can be further improved.
After the target starting position and the target ending position are respectively determined, the pixel points in the caption to be displayed can be screened through the target starting position and the target ending position so as to determine the target pixel points of the coordinate positions between the target starting position and the target ending position, and then the target caption corresponding to the target pixel points is displayed, so that the data volume of caption display can be effectively reduced, and the probability of incomplete caption data display can be reduced to a certain extent. It should be noted that, when the subtitle display apparatus displays the target subtitle corresponding to the target pixel point, the color corresponding to the target pixel point may be obtained first, and the target subtitle corresponding to the target pixel point is obtained together according to the color and the transparency corresponding to the target pixel point, and the target subtitle corresponding to the target pixel point is displayed. For example, the color corresponding to each pixel point in the subtitle may be included in the bitmap data together with the transparency, or of course, the color corresponding to each pixel point in the subtitle may also be obtained separately, and may be specifically set according to actual needs.
Under a general condition, after receiving bitmap data of a to-be-displayed caption sent by a to-be-displayed caption and sent by input equipment, a server of the caption display equipment directly sends the received bitmap data of the to-be-displayed caption to a client of the caption display equipment through binder transmission, so that the client of the caption display equipment determines the to-be-displayed caption to be displayed according to the bitmap data of the to-be-displayed caption, and the to-be-displayed caption passes through the to-be-displayed caption. However, when the amount of the subtitle data to be displayed is large, or when a plurality of subtitles need to be displayed in a short time, the server of the subtitle display device needs to spend a lot of time to send the bitmap data of the subtitles to be displayed to the client of the subtitle display device due to the rate limit of data transmission by the binder, so that the subtitle display delay exists. The server side of the caption display device and the client side of the caption display device are two software modules arranged in the caption display device.
In order to solve the problem that the server of the caption display device needs to spend more time to send bitmap data of a caption to be displayed to the client of the caption display device, and the existing caption display time delay exists, the server of the caption display device in the embodiment of the invention does not directly send the bitmap data of the caption to be displayed, which comprises the position and the transparency of each pixel point in the caption to be displayed, to the client of the caption display device after receiving the bitmap data of the caption to be displayed, but firstly determines a target starting position and a target ending position meeting transparency conditions according to the transparency of each pixel point in the caption to be displayed, and filters the pixel points in the caption to be displayed through the target starting position and the target ending position so as to determine target pixel points of coordinate positions between the target starting position and the target ending position, then, the color and the transparency of the target pixel point are sent to a client of the caption display equipment; correspondingly, the client of the caption display device can determine the target caption corresponding to the target pixel point according to the color and the transparency of the target pixel point and display the target caption through the screen of the caption display device, so that the probability of incomplete caption data display can be reduced to a certain extent, the caption data volume sent to the client of the caption display device by the server of the caption display device is reduced, and the caption display time delay is reduced.
It can be seen that, in the above description, the server of the subtitle display apparatus needs to send the color and the transparency of the target pixel point to the client of the subtitle display apparatus, so that the client of the subtitle display apparatus constructs the target subtitle corresponding to the target pixel point according to the received color and the transparency of the target pixel point. Because the color and the transparency of the target pixel point generally need to be represented by four bytes, in order to further reduce the amount of the subtitle data sent by the server of the subtitle display device to the client of the subtitle display device, the target index value of the palette data corresponding to the color and the transparency of the pixel point can be used for replacing the color and the transparency of the pixel point based on the mapping relation between the color and the transparency of the pixel point and the palette data, so that the amount of the subtitle data sent by the server of the subtitle display device to the client of the subtitle display device can be further reduced, and the subtitle display time delay is further reduced. For example, the index value may be represented by a number.
When the target index value of the palette data corresponding to the color and the transparency of the pixel point is used to replace the color and the transparency of the pixel point, in a possible implementation manner, a server of the subtitle display device may first determine the target index value of the palette data corresponding to the color and the transparency corresponding to the target pixel point, and send the target index value to a client of the subtitle display device. In another possible implementation manner, after determining a target index value of palette data corresponding to a color and a transparency corresponding to a target pixel, the subtitle display device may send the target index value and the palette data (with a smaller data size) to a client of the subtitle display device together.
The client of the caption display device obtains the target caption corresponding to the target pixel point according to the color and the transparency corresponding to the target pixel point, and the target caption can be displayed through the screen of the caption display device, so that the probability of incomplete caption data display can be reduced to a certain extent, the caption data volume sent to the client of the caption display device by the server of the caption display device is reduced, and the caption display time delay is reduced.
Fig. 5 is a schematic structural diagram of a subtitle display apparatus 50 according to an embodiment of the present invention, which is applied to a subtitle display device, for example, as shown in fig. 5, the subtitle display apparatus 50 may include:
an obtaining unit 501, configured to obtain bitmap data of a subtitle to be displayed; the bitmap data comprises the positions and the transparencies of all pixel points in the subtitles to be displayed.
The processing unit 502 is configured to determine, according to the transparency of each pixel point in the subtitle to be displayed, a target start position and a target end position that satisfy a transparency condition, and determine, among the pixel points in the subtitle to be displayed, a target pixel point whose coordinate position is between the target start position and the target end position.
The display unit 503 is configured to display the target subtitle corresponding to the target pixel point.
Optionally, the transparency condition includes that the transparency is smaller than a preset threshold.
Optionally, the bitmap data further includes colors of each pixel point in the subtitle to be displayed, and the processing unit 502 is further configured to obtain the target subtitle corresponding to the target pixel point according to the color and the transparency corresponding to the target pixel point.
The display unit 503 is configured to display the target subtitle corresponding to the target pixel point.
Optionally, the processing unit 502 includes a server of the subtitle display apparatus and a client of the subtitle display apparatus.
The server side of the caption display equipment is used for determining the target index value of the palette data corresponding to the color and the transparency corresponding to the target pixel point; and sending the target index value to a client of the subtitle display device.
The client of the subtitle display equipment is used for obtaining the color and the transparency corresponding to the target pixel point according to the target index value and the palette data; and obtaining the target caption corresponding to the target pixel point according to the color and the transparency corresponding to the target pixel point.
Optionally, the server of the subtitle display apparatus is further configured to send the palette data to the client of the subtitle display apparatus.
Optionally, the processing unit 502 is specifically configured to divide the subtitles to be displayed into N equal parts in the height direction through N +1 parallel lines according to the height of the subtitles to be displayed; determining an initial position and an end position corresponding to each parallel line according to the transparency of each pixel point on each parallel line in the N +1 parallel lines; and determining a target starting position according to the starting position corresponding to each parallel line, and determining a target ending position according to the ending position corresponding to each parallel line.
Optionally, the processing unit 502 is specifically configured to determine, according to the starting position corresponding to each parallel line, a most front starting position in the starting positions corresponding to the N +1 parallel lines, and determine a target starting position according to the most front starting position; and determining the rearmost termination position in the termination positions corresponding to the N +1 parallel lines according to the termination positions corresponding to the parallel lines, and determining the target termination position according to the rearmost termination position.
Optionally, the processing unit 502 is specifically configured to traverse the transparency of each pixel point on the first parallel line according to the display sequence of the subtitles to be displayed, determine, as an initial position corresponding to the first parallel line, a position of a first pixel point satisfying a transparency condition among the pixel points on the first parallel line, and determine, as an end position corresponding to the first parallel line, a position of a last pixel point satisfying the transparency condition; wherein, the first parallel line is any one of the N +1 parallel lines.
The caption display device 50 according to the embodiment of the present invention may implement the technical solution of the caption display method according to any one of the embodiments shown in the above drawings, and the implementation principle and the beneficial effects thereof are similar to those of the caption display method, and are not described herein again.
Fig. 6 is a schematic structural diagram of a subtitle presenting apparatus 60 according to an embodiment of the present invention, and for example, referring to fig. 6, the subtitle presenting apparatus 60 may include a memory 601 and a processor 602.
A memory 601 for storing a computer program;
the processor 602 is configured to read the computer program stored in the memory 601, and execute the method for displaying subtitles according to any of the embodiments described above according to the computer program in the memory 601.
Alternatively, the memory 601 may be separate or integrated with the processor 602. When the memory 601 is a device separate from the processor 602, the subtitle presentation apparatus may further include: a bus for connecting the memory 601 and the processor 602.
Optionally, this embodiment further includes: a communication interface that may be coupled to the processor 602 via a bus. The processor 602 may control the communication interface to implement the functions of receiving and transmitting of the subtitle presentation device described above.
The subtitle display apparatus 60 according to the embodiment of the present invention may implement the technical solution of the subtitle display method according to any one of the embodiments shown in the above drawings, and the implementation principle and the advantageous effects thereof are similar to those of the subtitle display method, and are not described herein again.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the method for displaying a subtitle according to any of the above embodiments is implemented, and an implementation principle and beneficial effects of the method for displaying a subtitle are similar to those of the method for displaying a subtitle, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts shown as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention.
It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present invention are not limited to only one bus or one type of bus.
The computer-readable storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A subtitle display method is applied to subtitle display equipment and comprises the following steps:
acquiring bitmap data of a subtitle to be displayed; the bitmap data comprises the positions and the transparencies of all pixel points in the subtitles to be displayed;
determining a target initial position and a target termination position which meet transparency conditions according to the transparency of each pixel point in the subtitle to be displayed, and determining a target pixel point of which the coordinate position is between the target initial position and the target termination position in each pixel point in the subtitle to be displayed;
displaying a target caption corresponding to the target pixel point;
the determining the starting position and the ending position meeting the transparency condition according to the transparency of each pixel point in the subtitle to be displayed comprises the following steps:
dividing the subtitle to be displayed into N equal parts in the height direction through N +1 parallel lines according to the height of the subtitle to be displayed;
determining an initial position and an end position corresponding to each parallel line according to the transparency of each pixel point on each parallel line in the N +1 parallel lines;
and determining the target starting position according to the starting position corresponding to each parallel line, and determining the target ending position according to the ending position corresponding to each parallel line.
2. The method of claim 1,
the transparency condition includes that the transparency is less than a preset threshold.
3. The method according to claim 1, wherein the bitmap data further includes colors of pixels in the subtitles to be displayed, and the displaying of the target subtitles corresponding to the target pixels includes:
obtaining a target caption corresponding to the target pixel point according to the color and the transparency corresponding to the target pixel point;
and displaying the target caption corresponding to the target pixel point.
4. The method according to claim 3, wherein obtaining the target caption corresponding to the target pixel point according to the color and the transparency corresponding to the target pixel point comprises:
the server side of the subtitle display equipment determines a target index value of the palette data corresponding to the color and the transparency corresponding to the target pixel point;
the server side of the subtitle display equipment sends the target index value to the client side of the subtitle display equipment;
the client of the subtitle display equipment obtains the color and the transparency corresponding to the target pixel point according to the target index value and the palette data;
and the client of the subtitle display equipment obtains the target subtitle corresponding to the target pixel point according to the color and the transparency corresponding to the target pixel point.
5. The method of claim 4, further comprising:
and the server side of the subtitle display equipment sends the palette data to the client side of the subtitle display equipment.
6. The method of claim 1, wherein the determining the target starting position according to the starting position corresponding to each parallel line and the determining the target ending position according to the ending position corresponding to each parallel line comprises:
determining the most front initial position in the initial positions corresponding to the N +1 parallel lines according to the initial positions corresponding to the parallel lines, and determining the target initial position according to the most front initial position;
and determining the rearmost termination position in the termination positions corresponding to the N +1 parallel lines according to the termination positions corresponding to the parallel lines, and determining the target termination position according to the rearmost termination position.
7. The method according to claim 1, wherein the determining the start position and the end position corresponding to each parallel line according to the transparency of each pixel point on each parallel line of the N +1 parallel lines respectively comprises:
traversing the transparency of each pixel point on a first parallel line according to the display sequence of the subtitles to be displayed, determining the position of the first pixel point meeting the transparency condition in each pixel point on the first parallel line as the initial position corresponding to the first parallel line, and determining the position of the last pixel point meeting the transparency condition as the end position corresponding to the first parallel line; wherein, the first parallel line is any one of the N +1 parallel lines.
8. A caption display device is applied to caption display equipment, and the device comprises:
the system comprises an acquisition unit, a display unit and a display unit, wherein the acquisition unit is used for acquiring bitmap data of a subtitle to be displayed; the bitmap data comprises the positions and the transparencies of all pixel points in the subtitles to be displayed;
the processing unit is used for determining a target initial position and a target termination position which meet transparency conditions according to the transparency of each pixel point in the subtitle to be displayed, and determining a target pixel point of which the coordinate position is between the target initial position and the target termination position in each pixel point in the subtitle to be displayed;
the display unit is used for displaying the target caption corresponding to the target pixel point;
the processing unit is specifically configured to:
dividing the subtitle to be displayed into N equal parts in the height direction through N +1 parallel lines according to the height of the subtitle to be displayed;
determining an initial position and an end position corresponding to each parallel line according to the transparency of each pixel point on each parallel line in the N +1 parallel lines;
and determining the target starting position according to the starting position corresponding to each parallel line, and determining the target ending position according to the ending position corresponding to each parallel line.
9. A subtitle display device is characterized by comprising a memory and a processor;
a memory for storing a computer program;
a processor for reading the computer program stored in the memory and executing the method for displaying a subtitle according to any one of claims 1 to 7 according to the computer program in the memory.
10. A computer-readable storage medium, wherein a computer-executable instruction is stored in the computer-readable storage medium, and when the computer-executable instruction is executed by a processor, the method for displaying a subtitle according to any one of claims 1 to 7 is implemented.
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