WO2015070761A1 - 智能电视媒体播放器及其字幕处理方法、智能电视 - Google Patents

智能电视媒体播放器及其字幕处理方法、智能电视 Download PDF

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WO2015070761A1
WO2015070761A1 PCT/CN2014/090918 CN2014090918W WO2015070761A1 WO 2015070761 A1 WO2015070761 A1 WO 2015070761A1 CN 2014090918 W CN2014090918 W CN 2014090918W WO 2015070761 A1 WO2015070761 A1 WO 2015070761A1
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subtitle
subtitle file
file
played
media
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PCT/CN2014/090918
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English (en)
French (fr)
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黄鹏
仝永辉
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乐视致新电子科技（天津）有限公司
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Priority to US15/036,378 priority Critical patent/US20160301982A1/en
Publication of WO2015070761A1 publication Critical patent/WO2015070761A1/zh

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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
    • H04N21/47—End-user applications
    • H04N21/488—Data services, e.g. news ticker
    • H04N21/4884—Data services, e.g. news ticker for displaying subtitles
    • 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
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
    • H04N21/43072—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64322—IP
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/23424—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement
    • 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
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • 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]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/85—Assembly of content; Generation of multimedia applications
    • H04N21/854—Content authoring
    • H04N21/85406—Content authoring involving a specific file format, e.g. MP4 format

Definitions

  • the present application relates to the field of smart TV media playback technologies, and in particular, to a smart television media player, a subtitle processing method thereof, and a smart television.
  • Smart TV is an intelligent multimedia terminal that conforms to the trend of “high definition”, “networking” and “intelligence” of TV sets. It has the content of obtaining programs from various channels such as the Internet, video equipment and computers.
  • the integrated operator interface uses the features that consumers want most clearly on the big screen.
  • the smart TV can realize various application services such as network search, network television, video on demand (VOD), digital music, network news, network video telephone, and the like.
  • the TV is becoming the third type of information access terminal after the computer and mobile phone, and the user can access the information he needs at any time.
  • a smart TV has a fully open platform and is equipped with an operating system (such as Android). Users can install and uninstall programs provided by third-party service providers such as software and games to continuously expand the functions of the TV. Continuously bring users a rich and personalized experience.
  • the smart TV media player is a device that can play network streaming media and local audio and video files on the TV, which can realize the perfect sharing of network resources and the wonderful joyful moments shared by the whole TV family.
  • Existing audio and video files or streaming media resources will be based on the characteristics of their main audience and their media players (such as output resolution), and the media formats commonly used by major market objects (such as RM, RMVB, MPEG-). 1/2, DAT, AVI, DIVX, XVID, VOB and other video formats, or MP3, WMA, OGG and other audio formats) and other parameters to determine the subtitle information that needs to be fused to achieve the best viewing effect.
  • Existing media players generally select supported media formats and output resolutions according to the characteristics of the main users of the products.
  • the sources of media playback resources of smart TVs are various, for media with inconsistent output resolutions.
  • the subtitle font is too large or too small, the display is incomplete, the font is ambiguous, the font color is similar to the screen color, and the display effect is not good, which has a certain negative impact on the user's viewing experience.
  • One of the purposes of the subtitle processing method of the smart TV media player is to solve the problem that the existing media player has poor display effect on the subtitle display during the playback of the media data with inconsistent output resolution.
  • One of the purposes of a smart television and its media player is to ensure the application of the above method in practice.
  • a subtitle processing method for a smart TV media player comprising: reading a media information to be played and decoding, saving the obtained decoded data stream to a play buffer; searching and parsing a subtitle corresponding to the to-be-played media information Determining a subtitle file to be synthesized according to the matching degree of the subtitle file with the media information to be played and the media player platform; and decoding the subtitle file to be synthesized according to the preset subtitle display parameter of the media player
  • the subtitle content is superimposed into the decoded data stream according to the corresponding time to generate a composite data stream; wherein the subtitle display parameter includes a resolution size, a font size, a font color, and a subtitle display position; and the synthesized data stream is output and played.
  • a computer readable recording medium having recorded thereon a program for executing the above method.
  • the method for searching for a subtitle file corresponding to the to-be-played media information includes at least one of the following three methods: using a subtitle file having the same file body name as the name of the media information to be played as the to-be-played media. Associating the subtitle file of the information; the subtitle file containing the name of the media information to be played in the file name as the associated subtitle file of the to-be-played media information; and the subtitle file containing the name of the media information to be played in the file content as the to-be-played media Associated subtitle file for information.
  • the determining the subtitle file to be synthesized according to the matching degree between the subtitle file and the to-be-played media information and the media player platform comprises: determining the subtitle file and the to-be-played media information and media playing Whether the platform is completely matched; if yes, the fully matched subtitle file is used as the subtitle file to be synthesized; otherwise, the subtitle file is arranged in order of matching degree, prompting the user to select, and the subtitle file selected by the user As a subtitle file to be synthesized.
  • the determining the subtitle file to be synthesized according to the matching degree between the subtitle file and the to-be-played media information and the media player platform comprises: determining the subtitle file and the to-be-played media information and media playing Whether the platform is completely matched; if yes, the fully matched subtitle file is used as the subtitle file to be synthesized; otherwise, the subtitle file with the largest matching degree is selected as the subtitle file to be synthesized.
  • the method for determining the degree of matching between the subtitle file and the to-be-played media information and the media player platform comprises: matching the degree of the subject name of the subtitle file with the media information to be played and the preset weight ratio And calculating, according to the matching degree of the suffix name and the minor suffix name of the subtitle file and the matching degree of the media player platform and the preset weight ratio, the matching degree value of the subtitle file is calculated; wherein the matching value is larger, indicating the subtitle The matching degree of the file is higher; the perfect match value is the perfect match.
  • the method for calculating the matching value of the subtitle file specifically includes: determining whether the main body name of the subtitle file is the same as the name of the media information to be played or has an inclusion relationship, and the subtitle file and the to-be-played are played according to the judgment result.
  • the media information subject name association relationship table is obtained by obtaining a subject name weight value of the subtitle file; according to the suffix name and the minor suffix name of the subtitle file, respectively, the subtitle file type and the media player platform association relationship table and subtitles respectively.
  • the file language category and the media player platform association table are obtained by comparing the table suffix name weight and the minor suffix name weight; the value of the subject name weight, the suffix name weight, and the minor suffix name weight is added as the value The matching value of the subtitle file.
  • the method further includes: a dynamic adjustment process of the weight of the subject name, the suffix name, and the minor suffix name of the subtitle file, specifically: whether the subject name of the subtitle file is the same as or has an inclusion relationship with the name of the media information to be played,
  • the subtitle file suffix name and the minor suffix name are used to count the number of subtitle files selected by the user over a period of time, and the weight of the item exceeding the preset threshold is increased by 5-20.
  • the method further includes: receiving a caption display parameter selected or input by the user, and using the caption display parameter as a new preset caption display parameter.
  • a smart TV media player includes: a media acquisition module configured to read and decode a media information to be played, and save the obtained decoded data stream to a play buffer; the subtitle search parsing module is configured to search and parse a subtitle file corresponding to the media information to be played; the matching judging module is configured to determine a subtitle file to be synthesized according to the matching degree of the subtitle file with the media information to be played and the media player platform; and the media synthesis module is configured to And the subtitle content decoded by the subtitle file to be synthesized is superimposed into the decoded data stream according to a corresponding time according to the preset subtitle display parameter of the media player, to generate a synthesized data stream; wherein the subtitle display parameter includes Rate size, font size, font color, and caption display position; the media play module is configured to play and output the synthesized data stream.
  • the matching determining module specifically includes: a determining module configured to determine a degree of matching between the subtitle file and the media information to be played and the media player platform; and a user selection module configured to output an output according to the determining module, Arranging the subtitle files in order of matching degree, and prompting and receiving the user's selection;
  • the first matching module is configured to determine the subtitle file to be synthesized according to the judgment result of the judging module; and when the subtitle file and the to-be-played media When the information and the media player platform are completely matched, the fully matched subtitle file is used as the subtitle file to be synthesized; when the subtitle file does not completely match the to-be-played media information and the media player platform, the user selection module is called to receive The user's selection and the subtitle file selected by the user as the subtitle file to be synthesized.
  • the matching determining module specifically includes: a determining module configured to determine a matching degree between the subtitle file and the to-be-played media information and the media player platform; and a second matching module configured to determine a judgment result according to the determining module Determining a subtitle file to be synthesized; when the subtitle file is completely matched with the media information to be played and the media player platform, the fully matched subtitle file is used as a subtitle file to be synthesized; when the subtitle file and the subtitle file are When the playing media information and the media player platform do not completely match, the subtitle file with the largest matching degree is selected as the subtitle file to be synthesized.
  • the method further includes: a parameter setting module configured to receive a subtitle display parameter selected or input by the user, and use the subtitle display parameter as a new preset subtitle display parameter.
  • a parameter setting module configured to receive a subtitle display parameter selected or input by the user, and use the subtitle display parameter as a new preset subtitle display parameter.
  • a smart television includes any of the above-described smart television media players.
  • the embodiment of the present application has the following advantages:
  • the preferred embodiment of the present application can effectively control the size, color and resolution of the subtitles by the above means, so that the subtitle content is displayed with the best effect, and solves the problem that the existing media player has poor user experience due to poor subtitle display effect. .
  • FIG. 1 is a flowchart of an embodiment of a method for processing a subtitle of a smart television media player according to the present application
  • 2-1 and 2-2 are respectively two specific implementation method flows of step S103 in the method embodiment shown in FIG. 1;
  • FIG. 3 is a schematic structural diagram of a first embodiment of a smart television media player according to the present application.
  • FIG. 4 is a schematic structural diagram of a second embodiment of a smart television media player according to the present application.
  • FIG. 1 a flow of an embodiment of a subtitle processing method of a smart TV media player of the present application is shown.
  • the execution subject is a media player installed on a smart TV.
  • the preferred method embodiment includes the following steps:
  • Step S101 After reading the media information to be played and decoding, the obtained decoded data stream is saved to the play buffer.
  • the to-be-played media information is audio and video files stored on the smart TV local, external storage device, or streaming media data stored on the media server.
  • a segmented downloading method may be used to enable playback while downloading (ie, downloading subsequent segments while playing):
  • the data stream is read from the streaming server, decoded and saved to the play buffer.
  • the format of the media information to be played may be determined first, and then according to the format.
  • the decoding method is to decode the media information to be played.
  • the format of the media information to be played may be determined in various manners, for example, may be obtained according to the suffix name of the media file to be played, or may be obtained according to relevant format information (such as file header information) in the media data.
  • the media information to be played it is generally a moving image such as a video, but in reality, the dynamic image is composed of a static image of one frame and one frame in a certain time sequence, in the process of playing, The static images are played in this chronological order, and since the time interval between each frame is short, a continuous dynamic playback effect is finally obtained. That is to say, for the media information to be played, the information contained therein includes not only the data content of each frame image (for example, the display content on each pixel, etc.) but also the time information corresponding to each frame image. Therefore, After the media information to be played is decoded, the specific data content of each frame image and the corresponding time information can be obtained. For the time information, the subsequent steps of synthesizing the subtitle file in the embodiment of the present application have important significance, which will be described in detail later.
  • Step S102 Find and parse a subtitle file corresponding to the media information to be played
  • the subtitle file is generally a separate file that is independent of the media information to be played and has a specific file format.
  • SRT SRT
  • SSA SRT
  • ASS ASS
  • SUP etc.
  • the most commonly used is the SRT format and the SSA format.
  • the SRT format is just a simple time code and text content, while the SSA can make some special effects, such as specifying the font size, color and some simple animations (rolling, moving. 7-8)Wait.
  • the subtitle file may be made by some users, or there may be a provider specializing in subtitle files, and so on.
  • the related subtitle file may be searched from the directory (or subdirectory) where the audio and video files are located, or may be set from the media player.
  • the subtitle file storage directory (or subdirectory) can be searched for related subtitle files, and the related subtitle files can be searched and downloaded from the Internet; of course, the above positions can be searched in order from front to back until the relevant subtitle file is found.
  • the search can be performed from each of the above sources, and the found subtitle file can be used as the candidate subtitle file. , to determine the degree of matching with the current media player.
  • the related subtitle data may be searched from the associated location where the streaming media information is located, or the related subtitle file may be searched and downloaded from the Internet; The order is searched until the relevant subtitle file is found. Similarly, the search may be performed from each of the above sources, and the found subtitle file may be used as a candidate subtitle file to determine the degree of matching with the current media player.
  • the method for determining the relevance of the media information to be played and the subtitle file may be determined by, but not limited to, the following:
  • the file name is exactly matched.
  • the subtitle file and the media information to be played may have the same file name body. Therefore, if the subtitle file has the same name as the media information to be played, the subtitle file is used as the subtitle file associated with the to-be-played media information;
  • Method 2 file name fuzzy matching method.
  • Some subtitle file names will have more content than the file name of the media information to be played.
  • the extra content may be the subtitle language type identifier.
  • chs Choinese Simplified
  • cht Choinese Traditional
  • Chinese, eng English subtitles.
  • the file name of a subtitle file may be “Golden Three Darts. CD1.chs.srt”
  • the file name of the media information to be played may be “Golden Three Darts. CD1.rmvb”, that is, the subtitle file name and The file name of the playback media information is not exactly the same, but the file name of the subtitle file contains the name of the media information file to be played.
  • the two generally correspond to the same video and have an association relationship. Therefore, if the name of the media information file to be played is included in the name of the subtitle file, the subtitle file is used as the subtitle file associated with the to-be-played media information;
  • the third method and the content fuzzy matching manner that is, if the content of the media information file to be played is included in the content of the subtitle file, the subtitle file is used as the subtitle file associated with the to-be-played media information.
  • Step S103 determining, according to the matching degree of the subtitle file and the media information to be played and the media player platform, the subtitle file to be synthesized;
  • the method for determining the subtitle file to be synthesized may be implemented by using any one of the following solutions:
  • step S103 in the embodiment of the preferred method is shown, which specifically includes:
  • step S1031 determining whether the subtitle file is completely matched with the media information to be played and the media player platform; if yes, go to step S1032; otherwise, go to step S1033;
  • the format of the subtitle file may be a graphic data format or a text data format, such as SRT (Subripper), SSA (Sub Station Alpha), ASS (Advanced SubStation Alpha), SMI (Sami), PSB (Power Divx), PJS (Phoenix japanimation), STL (Spruce subtittle file), TTS (Turbo tittle), VSF (Viplay), ZEG (Zero G), and the like.
  • SRT Subripper
  • SSA Sub Station Alpha
  • ASS Advanced SubStation Alpha
  • SMI Sesami
  • PSB Power Divx
  • PJS Phoenix japanimation
  • STL Spruce subtittle file
  • TTS Teurbo tittle
  • VSF Viplay
  • ZEG Zero G
  • the matching degree of the subtitle file is determined based on the subject name, the suffix name, and the minor suffix name of the subtitle file, wherein:
  • the subject name of the subtitle file is the string before the first point, the suffix name is the string after the last point, and the subsuffix name is the string between the last point and the second last point, if the subtitle file name is only One point, followed by the suffix name is empty.
  • the subject of the subtitle file "Avatar.chs.srt”
  • the name is "Avatar”
  • the suffix name is "srt”
  • the minor suffix name is "chs”
  • the subtitle file "Avatar.ssa” has the main name "Avatar”
  • the suffix name is "ssa”
  • the secondary suffix name is empty.
  • the weight ratio of the subject name of the subtitle file is 50%
  • the weight ratio of the suffix name and the minor suffix name is 50%.
  • the weight ratio and the weight of the specific item can be directly combined into the weight item.
  • a calculation method of the matching degree value is described in combination with a specific example.
  • the matching degree value is 100 points
  • the weights of the corresponding items can be obtained from the following three comparison tables, and three weights are obtained. The sum of the values is used as the match value:
  • Table 1 Comparison table of subtitle files and subject information of the media information to be played
  • Table 2 Subtitle file type and media player platform association table
  • Table 3 Subtitle file language category and media player platform association table
  • the media file “Avatar.mp4" to be played the subtitle files “Avatar.srt”, “Avatar.chs.srt”, “Avatar.ssa”, “Avatar.eng.sub”, “Unknown name.ch.srt”
  • the matching values are:
  • the weight distribution of related items in Tables 1 to 3 above is formulated by experienced relevant technical personnel according to different smart TV platforms, in order to obtain the subtitle file with the highest matching degree and the best subtitle display effect.
  • the weights of the above items may be manually adjusted by the relevant personnel according to the user's usage; or according to the user's selection of the subtitle file, the above Tables 1 to 3 may be dynamically adjusted as follows: For example, 1 week), users who exceed a certain percentage (such as 20% or more) manually select subtitle files with lower matching value, or, for a period of time, most users (such as 80% or more users) choose If the subtitle file has the largest matching value but the matching value is not equal to 100, then the preferred embodiment of the method will determine whether the subject name of the subtitle file is the same as or has an inclusion relationship with the name of the media information to be played, and the subtitle file suffix name and time.
  • the suffix name classifies the number of subtitle files selected by the user, and automatically exceeds a preset threshold (such as the user).
  • the item weight of 50% of the selected subtitle file is increased by 5 to 20 orders of magnitude (required: the sum of the highest weights of the three comparison tables is ⁇ 100).
  • Tables 1 to 3 above Taking the data in Tables 1 to 3 above as an example, if within 1 week, 20% of the users select a subtitle file with a lower matching value, and in the subtitle file with a lower matching value, there are 50 % subtitle file suffix is ssa, then the system automatically increases the weight of the ssa ssa from 15 To 20.
  • a pre-set encoding value distribution probability table for each character encoding (the distribution probability table can be adjusted at any time according to experience accumulation);
  • the character code having the highest probability of the caption file probability is determined as the character code of the caption file.
  • Step S1032 The fully matched subtitle file is taken as the subtitle file to be synthesized; go to step S104;
  • Step S1033 Arranging the subtitle file in order of matching degree, prompting the user to select, and using the subtitle file selected by the user as the subtitle file to be synthesized;
  • the system saves the above selection of the user, and when the next playback is performed, the user is saved last time. Subtitles.
  • step S103 a flow of another specific implementation method of step S103 in the preferred method embodiment is shown.
  • the difference between the solution and the solution shown in FIG. 2-1 is: when the subtitle file and the media information to be played and the media
  • the following method is used to determine the subtitle file to be synthesized:
  • Step S1034 Select the subtitle file with the largest matching degree as the subtitle file to be synthesized.
  • Step S104 According to the preset subtitle display parameter of the media player, superimpose the subtitle content decoded by the subtitle file to be combined into the decoded data stream according to a corresponding time to generate a synthesized data stream;
  • the subtitle display parameters in the player may be preset, for example, the player provides some default settings after going online. Alternatively, it can be modified by the user according to his own needs.
  • the above subtitle display parameters include resolution size, font size, font color, subtitle display position, and the like. among them,
  • the resolution size includes: 1920*1080, 1366*768, 1280*720, 848*480, 640*480
  • Font size includes: large, medium and small
  • Font colors include: white, black, gray, yellow, green, blue
  • the subtitle display position includes: horizontal display on the lower part of the screen, horizontal display on the upper part of the screen, vertical display on the right side of the screen, and vertical display on the left side of the screen.
  • the subtitle file also contains time information, which provides a basis for synthesizing the decoded data stream of the media information to be played.
  • Subtitle files generally include graphic format subtitles as well as text format subtitles.
  • the graphic format subtitle is composed of idx and sub file, and idx is equivalent to the index file, which includes the time code of the subtitle appearing and the attribute of the subtitle display, and the sub file is the subtitle data itself.
  • srt smi, ssa or sub (same as the graphic format suffix, but the data format is different), where srt text subtitles are the most popular, because its production and modification is very simple: a time code + a sentence subtitle.
  • srt subtitle file content For example, for the following srt subtitle file content:
  • the 45th line of subtitles shows the time from the second point of 52.184 seconds from the beginning of the audio and video to the second point of 53.617 seconds.
  • the subtitles are: Slowly.
  • the decoded data stream is superimposed with the corresponding subtitle content.
  • Step S105 Play output the above synthesized data stream.
  • the preferred method embodiment determines the subtitle file to be synthesized according to the matching degree between the character set of the subtitle file, the subtitle format and the smart TV media player, and synthesizes the subtitle content and the media data stream according to the effective display parameters of the media player, which can be effective. Control the size, color and resolution of the subtitles so that the subtitle content is displayed with the best effect.
  • the method further includes:
  • Subtitle display parameter adjustment step S100 receiving a subtitle display parameter selected or input by the user, and The subtitle display parameter is used as a new preset subtitle display parameter.
  • the subtitle display parameter adjustment step S100 may be performed at any timing after the media player is started. After the subtitle display parameter modification is valid, the following scheme may be adopted:
  • Solution 1 The media being played is executed according to the original subtitle display parameters, and the new subtitle display parameters take effect when the next media is played;
  • Solution 2 dynamically adjust subsequent media segments; for subsequent playback of the media segments, when synthesizing the playback data stream, the newly adjusted subtitle display parameters are used to superimpose the subtitle content into the decoded data stream according to the corresponding time.
  • step S103 the step of searching and parsing the subtitle file may be performed after steps S101 and S102, or may be performed before step S101 or between S101 and S102, and may also be performed.
  • Step S101 is performed at the same time.
  • the present application also discloses a computer readable recording medium on which a program for executing the above method is recorded.
  • the computer readable recording medium includes any mechanism configured to store or transfer information in a form readable by a computer (for example, a computer).
  • a machine-readable medium includes read only memory (ROM), random access memory (RAM), magnetic disk storage media, optical storage media, flash storage media, electrical, optical, acoustic, or other forms of propagation signals (eg, carrier waves) , infrared signals, digital signals, etc.).
  • FIG. 3 a block diagram of a first embodiment of a smart television media player of the present application is shown, including a media acquisition module 31, a subtitle search parsing module 32, a matching judging module 33, a media synthesizing module 34, a media playing module 35, and parameters.
  • Set module 30 etc., where:
  • the media acquisition module 31 is configured to read the media information to be played and decode the saved data stream to the play buffer.
  • the subtitle lookup parsing module 32 is configured to find and parse the subtitle file corresponding to the media information to be played.
  • the matching judging module 33 is configured to determine the subtitle file to be synthesized according to the matching degree between the subtitle file obtained by the subtitle search parsing module 32 and the media information to be played and the media player platform.
  • the matching judging module 33 specifically includes:
  • the determining module 331 is configured to determine the matching degree between the subtitle file obtained by the subtitle search parsing module 32 and the media information to be played and the media player platform.
  • the user selection module 330 is configured to arrange the subtitle files in order of matching degree according to the output result of the judging module 331 to prompt and receive the user's selection.
  • the first matching module 332 is configured to determine, according to the determination result of the determining module 331, the subtitle file to be synthesized; when the subtitle file completely matches the media information to be played and the media player platform, the fully matched subtitle file is used as the subtitle file to be synthesized.
  • the calling user selection module 330 receives the user's selection, and uses the subtitle file selected by the user as the subtitle file to be synthesized.
  • the media synthesizing module 34 is configured to: according to the preset caption display parameter of the media player, superimpose the subtitle content decoded by the subtitle file to be superimposed into the decoded data stream according to a corresponding time to generate a synthesized data stream;
  • the subtitle display parameter includes a font size, a font color, and a subtitle display position.
  • the media playing module 35 is configured to perform play output on the synthesized data stream generated by the media synthesizing module 34.
  • the parameter setting module 30 is configured to receive a caption display parameter selected or input by the user, and use the caption display parameter as a new preset caption display parameter.
  • the matching determining module 33 specifically includes the following modules:
  • the determining module 331 is configured to determine a matching degree between the subtitle file and the media information to be played and the media player platform;
  • the second matching module 333 is configured to determine, according to the determination result of the determining module 331, the subtitle file to be synthesized; when the subtitle file completely matches the media information to be played and the media player platform, the fully matched subtitle file is used as the subtitle to be synthesized. File; when the subtitle file does not completely match the media information to be played and the media player platform, the subtitle file with the largest matching degree is selected as the subtitle file to be synthesized.
  • the present application also discloses a smart TV including the above media player, which can play audio and video files stored in local and external storage devices and streaming media stored on the media server.
  • the smart TV also includes:
  • Main chip Adopt integrated smart TV main chip, the main frequency is not less than 800M, ARM architecture, with DSP (video hard decoding);
  • DDR2 with no less than 256MB
  • Nand flash memory or EMC flash memory the capacity is not less than 2G;
  • External device interface including at least 4 USB ports, which can be connected to U disk, mobile hard disk, keyboard, mouse, wireless mouse and keyboard receiver, WIFI wireless network card, game controller, etc.
  • Remote control at least buttons such as up, down, left, right, confirmation, return, menu, home, 0-9 number keys, etc.
  • the resolution is not less than 1280*720.

Abstract

本申请提供了一种智能电视媒体播放器及其字幕处理方法、智能电视。其中，所述方法包括：读取待播放媒体信息并进行解码后，将得到的解码数据流保存至播放缓冲区；查找并解析与所述待播放媒体信息对应的字幕文件；根据所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度，确定待合成字幕文件；根据所述媒体播放器的预设字幕显示参数，将所述待合成字幕文件解码后的字幕内容按相应的时间叠加到解码数据流中，生成合成数据流；播放输出所述合成数据流。本申请实施例可有效控制字幕内容以最佳效果显示，解决现有媒体播放器因字幕显示效果不佳造成的用户体验差的问题。

Description

智能电视媒体播放器及其字幕处理方法、智能电视 技术领域
本申请涉及智能电视(Smart TV)媒体播放技术领域，特别地，涉及一种智能电视媒体播放器及其字幕处理方法、智能电视。
背景技术
智能电视是顺应电视机“高清化”、“网络化”、“智能化”的趋势而出现的一种智能多媒体终端，具备从因特网、视频设备、计算机等多种渠道获得节目内容，通过简单易用的整合式操作界面将消费者最需要的内容在大屏幕上清晰地展现的功能。与传统电视的应用平台相比，智能电视可实现网络搜索、网络电视、视频点播(VOD)、数字音乐、网络新闻、网络视频电话等各种应用服务。电视机正在成为继计算机、手机之后的第三种信息访问终端，用户可随时访问自己需要的信息。智能电视像智能手机一样，具有全开放式平台，搭载了操作系统(如安卓系统)，用户可自行安装和卸载软件、游戏等第三方服务商提供的程序，来不断对电视的功能进行扩充，持续不断地给用户带来丰富的个性化体验。
智能电视媒体播放器是一种可以在电视上播放网络流媒体和本地音、视频文件的装置，可实现网络资源的完美共享和电视全家人共享精彩欢乐时刻。字幕，作为各种媒体的重要辅助信息，对提高用户的使用体验具有很重要的作用。现有音视频文件或流媒体资源在制作过程中，会根据自己的主要受众及其媒体播放器的特点(如输出分辨率等)、主要市场对象常用的媒体格式(如RM、RMVB、MPEG-1/2、DAT、AVI、DIVX、XVID、VOB等视频格式，或MP3、WMA、OGG等音频格式)等参数来确定需要融合的字幕信息，使其达到最佳观赏效果。
现有媒体播放器一般是根据产品主要用户的特点选定可支持的媒体格式和输出分辨率的，但是，由于智能电视的媒体播放资源的来源多种多样，对于输出分辨率不一致的媒体，在播放过程中必然会出现字幕字体过大或过小、显示不全、字体模糊不清、字体颜色与画面颜色相近等显示效果不佳的问题，对用户的观赏体验带来一定的负面影响。
发明内容
一种智能电视媒体播放器的字幕处理方法，目的之一在于解决现有媒体播放器对于输出分辨率不一致的媒体数据在播放过程中字幕显示效果不佳的问题。
一种智能电视及其媒体播放器，目的之一在于保证上述方法在实际中的应用。
一种智能电视媒体播放器的字幕处理方法，包括：读取待播放媒体信息并进行解码后，将得到的解码数据流保存至播放缓冲区；查找并解析与所述待播放媒体信息对应的字幕文件；根据所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度，确定待合成字幕文件；根据所述媒体播放器的预设字幕显示参数，将所述待合成字幕文件解码后的字幕内容按相应的时间叠加到解码数据流中，生成合成数据流；其中，所述字幕显示参数包括分辨率大小、字体大小、字体颜色和字幕显示位置；播放输出所述合成数据流。
一种在其上记录有用于执行上述方法的程序的计算机可读记录介质。
优选的，所述查找与所述待播放媒体信息对应的字幕文件的方法至少包括以下三种方式中的一种：将文件主体名称与待播放媒体信息的名称相同的字幕文件作为该待播放媒体信息的关联字幕文件；将文件名称中包含待播放媒体信息的名称的字幕文件作为该待播放媒体信息的关联字幕文件；将文件内容中包含待播放媒体信息的名称的字幕文件作为该待播放媒体信息的关联字幕文件。
优选的，所述根据所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度，确定待合成字幕文件，具体包括：判断所述字幕文件与所述待播放媒体信息及媒体播放器平台是否完全匹配；如果是，则将该完全匹配的字幕文件作为待合成字幕文件；否则，按匹配度从大到小的顺序排列字幕文件，提示用户进行选择，并将用户选择的字幕文件作为待合成字幕文件。
优选的，所述根据所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度，确定待合成字幕文件，具体包括：判断所述字幕文件与所述待播放媒体信息及媒体播放器平台是否完全匹配；如果是，则将该完全匹配的字幕文件作为待合成字幕文件；否则选择匹配度最大的字幕文件作为待合成字幕文件。
优选的，判断所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度的方法具体包括：根据所述字幕文件的主体名称与待播放媒体信息的匹配程度和预设的权重比例，以及，根据所述字幕文件的后缀名称和次后缀名称与媒体播放器平台的匹配程度和预设的权重比例，计算所述字幕文件的匹配度值；其中，匹配度值越大，表示字幕文件的匹配程度越高；匹配度值满分时为完全匹配。
优选的，所述字幕文件的匹配度值的计算方法具体包括：判断所述字幕文件的主体名称与所述待播放媒体信息的名称是否相同或具有包含关系，根据判断结果从字幕文件与待播放媒体信息主体名称关联关系对照表查表获得所述字幕文件的主体名称权值；根据所述字幕文件的后缀名称、次后缀名称，分别从字幕文件类型与媒体播放器平台关联关系对照表、字幕文件语言类别与媒体播放器平台关联关系对照表查表获得相应的后缀名称权值和次后缀名称权值；将上述主体名称权值、后缀名称权值、次后缀名称权值累加后的值作为所述字幕文件的匹配度值。
优选的，还包括对所述字幕文件的主体名称、后缀名称、次后缀名称的权值的动态调整过程，具体为：按字幕文件的主体名称与待播放媒体信息名称是否相同或有包含关系、字幕文件后缀名称和次后缀名称分类统计用户在一段时间内选择的字幕文件数量，将超过预设阈值的项目的权值增加5～20。
优选的，还包括：接收用户选择或输入的字幕显示参数，并将该字幕显示参数作为新的预设字幕显示参数。
一种智能电视媒体播放器，包括：媒体获取模块，配置为读取待播放媒体信息并进行解码后，将得到的解码数据流保存至播放缓冲区；字幕查找解析模块，配置为查找并解析与所述待播放媒体信息对应的字幕文件；匹配判断模块，配置为根据所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度，确定待合成字幕文件；媒体合成模块，配置为根据所述媒体播放器的预设字幕显示参数，将所述待合成字幕文件解码后的字幕内容按相应的时间叠加到解码数据流中，生成合成数据流；其中，所述字幕显示参数包括分辨率大小、字体大小、字体颜色和字幕显示位置；媒体播放模块，配置为对所述合成数据流进行播放输出。
优选的，所述匹配判断模块具体包括：判断模块，配置为判断所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度；用户选择模块，配置为根据判断模块的输出结果，按匹配度从大到小的顺序排列字幕文件，提示并接收用户的选择；第一匹配模块，配置为根据判断模块的判断结果确定待合成字幕文件；当所述字幕文件与所述待播放媒体信息及媒体播放器平台完全匹配时，将该完全匹配的字幕文件作为待合成字幕文件；当所述字幕文件与所述待播放媒体信息及媒体播放器平台不完全匹配时，调用用户选择模块接收用户的选择，并将用户选择的字幕文件作为待合成字幕文件。
优选的，所述匹配判断模块具体包括：判断模块，配置为判断所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度；第二匹配模块，配置为根据判断模块的判断结果，确定待合成字幕文件；当所述字幕文件与所述待播放媒体信息及媒体播放器平台完全匹配时，将该完全匹配的字幕文件作为待合成字幕文件；当所述字幕文件与所述待播放媒体信息及媒体播放器平台不完全匹配时，选择匹配度最大的字幕文件作为待合成字幕文件。
优选的，还包括：参数设置模块，配置为接收用户选择或输入的字幕显示参数，并将该字幕显示参数作为新的预设字幕显示参数。
一种智能电视，包括上述任意一种智能电视媒体播放器。
与现有技术相比，本申请实施例具有以下优点：
本申请优选实施例通过上述手段，可有效控制字幕的大小、颜色和分辨率等，使得字幕内容以最佳效果显示，解决现有媒体播放器因字幕显示效果不佳造成的用户体验差的问题。
附图说明
图1为本申请智能电视媒体播放器的字幕处理方法一实施例的流程图；
图2-1和2-2分别为图1所示的方法实施例中步骤S103的两种具体实施方法流程；
图3为本申请智能电视媒体播放器第一实施例的结构示意图；
图4为本申请智能电视媒体播放器第二实施例的结构示意图。
具体实施方式
为使本申请的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本申请作进一步详细的说明。
参照图1，示出了本申请智能电视媒体播放器的字幕处理方法一实施例的流程，执行主体为安装在智能电视上的媒体播放器。本优选方法实施例包括以下步骤：
步骤S101：读取待播放媒体信息并进行解码后，将得到的解码数据流保存至播放缓冲区；
在本优选实施例中，待播放媒体信息为存储于智能电视本地、外接存储设备上的音、视频文件，或存储于媒体服务器上的流媒体数据。
对于存储在媒体服务器上的流媒体数据，为进一步提高用户的观赏体验，可采用分段下载方式，实现边下载边播放(即在播放的同时下载后面各段内容)：
(1)建立与流媒体服务器连接；
(2)从流媒体服务器读取预定大小的数据，根据流媒体服务器的通讯协议解析该预定大小的数据，获得流媒体的类型、比特率、文件格式等流媒体参数信息；
(3)根据上述流媒体参数信息计算需要实际分配的缓冲区大小，然后申请大小等于该缓冲区大小的内存作为播放缓冲区；
(4)从流媒体服务器读取数据流，解码后保存至播放缓冲区。
其中，具体在对待播放媒体信息进行解码时，由于不同格式的媒体信息对应有不同的解码方法，因此，在对媒体信息进行解码之前，可以首先确定待播放媒体信息的格式，然后再根据格式对应的解码方式，对待播放媒体信息进行解码。其中，可以通过多种方式来确定待播放媒体信息的格式，例如，可以根据待播放媒体文件的后缀名来获得，也可以根据媒体数据中的相关格式信息(如文件头信息)获得。需要说明的是，对于待播放媒体信息而言，一般是视频等动态图像，但是实际上动态图像是由一帧一帧的静态图像按照一定的时间顺序排列组成的，在播放的过程中，就是按照这种时间顺序播放静态图像，由于每一帧之间的时间间隔很短，因此，最终得到连续的动态播放的播放效果。也就是说，对于待播放媒体信息而言，其中包含的信息不仅包括各帧图像的数据内容(例如各个像素上的显示内容等)，还包括各帧图像对应的时间信息。因此， 在对待播放媒体信息进行解码之后，可以得到各帧图像的具体数据内容以及对应的时间信息。对于时间信息而言，在本申请实施例后续的与字幕文件进行合成等步骤而言，具有重要的意义，后文中会有详细地介绍。
步骤S102：查找并解析与待播放媒体信息对应的字幕文件；
字幕文件一般是独立于待播放媒体信息的单独的文件，并且具有特定的文件格式。例如，SRT、SSA、ASS、SUP等。其中，最常用的是SRT格式以及SSA格式，SRT格式只是单纯的时间码和文本内容，而SSA却可以做出一些的特效，如指定字体的大小、颜色和一些简单的动画(翻滚、移动......)等。在实际应用中，字幕文件可能是一些用户自行制作的，或者一般还会有专门制作字幕文件的提供商，等等。总之，对于同一待播放媒体信息而言，在互联网中可能存在多份可用的字幕文件。
当待播放媒体信息为存储于智能电视本地或外接存储设备上的音、视频文件时，可以从音、视频文件所在的目录(或子目录)查找相关字幕文件，也可以从媒体播放器设置的字幕文件存放目录(或子目录)中查找相关字幕文件，还可以从互联网搜索并下载相关字幕文件；当然，也可以按上述位置从前到后的顺序进行查找，直到找到相关字幕文件为止。另外，为了能够从众多字幕文件中查找出与当前的媒体播放器匹配度最高的一个，在查找字幕文件时，可以分别从上述各个来源处进行查找，查找到的字幕文件都可以作为候选字幕文件，判断与当前媒体播放器之间的匹配程度。
当待播放媒体信息为存储于媒体服务器上的流媒体信息时，可以从该流媒体信息所在的关联位置查找相关字幕数据，也可以从互联网搜索并下载相关字幕文件；可以按上述位置从前到后的顺序进行查找，直到找到相关字幕文件为止。同样的，也可以分别从上述各个来源处进行查找，查找到的字幕文件都可以作为候选字幕文件，判断与当前媒体播放器之间的匹配程度。
对于待播放媒体信息与字幕文件的关联性判断方式，可以采用但不限于下述判断方式：
方式一、文件名精确匹配方式。一般情况下，字幕文件与待播放媒体信息会具有相同的文件名主体，因此，如果字幕文件与待播放媒体信息的名称相同，则将字幕文件作为与该待播放媒体信息关联的字幕文件；
方式二、文件名模糊匹配方式。有的字幕文件名会比待播放媒体信息的文件名多出一些内容，例如多出的内容可能是字幕语言类型的标识，如，chs(Chinese Simplified)表示简体中文，cht(Chinese Traditional)表示繁体中文，eng(English)表示英文字幕。例如，某字幕文件的文件名可能是“黄金三镖客.CD1.chs.srt”，待播放媒体信息的文件名可能是“黄金三镖客.CD1.rmvb”，也就是说，字幕文件名与待播放媒体信息文件名不完全相同，但是字幕文件的文件名中包含待播放媒体信息文件名，此时，两者之间一般是对应同一视频的，具有关联关系。因此，如果字幕文件名称中包括有待播放媒体信息文件名，则将字幕文件作为与该待播放媒体信息关联的字幕文件；
方式三、内容模糊匹配方式，即如果字幕文件内容中包括有待播放媒体信息文件名，则将字幕文件作为与该待播放媒体信息关联的字幕文件。
步骤S103：根据字幕文件与待播放媒体信息及媒体播放器平台的匹配程度，确定待合成字幕文件；
在本优选方法实施例中，确定待合成字幕文件的方法可采用下述方案中的任一方案实现：
参照图2-1，示出了本优选方法实施例中步骤S103的一种具体实施方法流程，具体包括：
S1031：判断字幕文件与待播放媒体信息及媒体播放器平台是否完全匹配；若是，转步骤S 1032；否则，转步骤S1033；
关于字幕文件的格式，可以是图形数据格式，也可以是文本数据格式，例如SRT(Subripper)、SSA(Sub Station Alpha)、ASS(Advanced SubStation Alpha)、SMI(Sami)、PSB(Power Divx)、PJS(Phoenix japanimation)、STL(Spruce subtittle file)、TTS(Turbo tittle)、VSF(Viplay)、ZEG(Zero G)等。对于字幕文件语言文字，包括chs、ch、cht、eng等。
在本优选实施例中，基于字幕文件的主体名称、后缀名称和次后缀名称来判断字幕文件的匹配程度，其中：
字幕文件的主体名称为第一个点之前的字符串，后缀名称为最后一个点之后的字符串，次后缀名称为最后一个点与倒数第二个点之间的字符串，如果字幕文件名只有一个点，其次后缀名称为空。如，字幕文件“阿凡达.chs.srt”的主体 名称为“阿凡达”，后缀名称为“srt”，次后缀名称为“chs”；字幕文件“阿凡达.ssa”的主体名称为“阿凡达”，后缀名称为“ssa”，次后缀名称为空。
在本优选实施例中，字幕文件的主体名称的权重比例为50％，后缀名称和次后缀名称的权重比例为50％。为计算方便，在综合考虑权重比例的情况下，可直接将权重比例与具体项目的权值合并到权值项。下面，结合具体实例说明匹配度值的计算方法，在本具体实例中，匹配度值满分为100分，可从下述三个对照表中查表获得相应项目的权值，并将三个权值之和作为匹配度值：
表1：字幕文件与待播放媒体信息主体名称关联关系对照表
Figure PCTCN2014090918-appb-000001
表2：字幕文件类型与媒体播放器平台关联关系对照表
字幕文件的后缀名称 权值
srt 30
lrc 20
ssa 15
ass 15
smi 10
sami 10
txt 5
sub 1
表3：字幕文件语言类别与及媒体播放器平台关联关系对照表
Figure PCTCN2014090918-appb-000002
Figure PCTCN2014090918-appb-000003
以待播放媒体文件“阿凡达.mp4”为例，字幕文件“阿凡达.srt”、“阿凡达.chs.srt”、“阿凡达.ssa”、“阿凡达.eng.sub”、“未知名称.ch.srt”的匹配度值分别为：
  表1 表2 表3 匹配度值
阿凡达.srt 50 30 10 90
阿凡达.chs.srt 50 30 20 100
阿凡达.ssa 50 15 10 75
阿凡达.eng.sub 50 1 5 56
未知名称.ch.srt 0 20 15 35
需要说明的是，上述表1～3中相关项目的权值分配由经验丰富的相关技术人员根据不同的智能电视平台情况制定，为了获得匹配度最高、字幕显示效果最佳的字幕文件，在使用过程中，上述各个项目的权值可由相关人员根据用户使用情况进行人工调整；也可根据用户对字幕文件的选择情况，采用如下方式对上述表1～3进行动态调整：如果在一段时间内(如1周)，超过一定比例(如20％以上)的用户采用手工方式选择了匹配度值较低的字幕文件，或者，在一段时间内，大多数用户(如80％以上的用户)都选择了匹配度值最大、但匹配度值不等于100的字幕文件，那么，本方法优选实施例将按字幕文件的主体名称与待播放媒体信息名称是否相同或有包含关系、字幕文件后缀名称和次后缀名称对用户选择的字幕文件数量进行分类统计，并自动将超过预设阈值(如占用户选择的字幕文件总量的50％)的项目权值提高5～20个数量级(要求：三个对照表的最高权值之和≤100)。以上述表1～3的数据为例，如果在1周时间内，有20％的用户选择了匹配度值较低的字幕文件，并且，在上述匹配度值较低的字幕文件中，有50％的字幕文件后缀为ssa，则系统自动将后缀ssa的权值由15增加 到20。
关于字幕文件具体使用的是何种语言文字编码，除上述优选实施例采用的文件名的次后缀名称判断方式外，还可以采用如下方法进行判断：
(1)根据经验，预先设置的每种字符编码的编码值分布概率表(该分布概率表可根据经验积累随时调整)；
(2)统计字幕文件包括的每种编码值在该字幕文件中出现的次数；
(3)根据预设的每种字符编码的编码值分布概率表以及字幕文件包括的每种编码值在字幕文件中出现的次数，统计字幕文件包括的每种编码值对应字符编码的概率；
(4)根据字幕文件包括的每种编码值对应字符编码的概率，计算字幕文件对应各个字符编码的可能性概率。
(5)将字幕文件可能性概率最大的字符编码确定为字幕文件的字符编码。
步骤S1032：将该完全匹配的字幕文件作为为待合成字幕文件；转步骤S104；
步骤S1033：按匹配度从大到小的顺序排列字幕文件，提示用户进行选择，并将用户选择的字幕文件作为待合成字幕文件；转步骤S104；
在本申请实施例确定了待合成的字幕文件之后，如果用户选择了匹配度值较低的字幕文件，系统会对用户的上述选择进行保存，待到下一次播放时，优先加载用户上次保存的字幕。
参照图2-2，示示出了本优选方法实施例中步骤S103的另一种具体实施方法流程，本方案与图2-1所示方案的区别在于：当字幕文件与待播放媒体信息及媒体播放器平台不完全匹配时，采用如下方法确定待合成字幕文件：
步骤S 1034：选择匹配度最大的字幕文件作为待合成字幕文件。
步骤S 104：根据媒体播放器的预设字幕显示参数，将所述待合成字幕文件解码后的字幕内容按相应的时间叠加到解码数据流中，生成合成数据流；
在具体实现时，播放器中的字幕显示参数可以是预先设置好的，例如，播放器在上线后提供了一些默认设置。或者，也可以是由用户按照自己的需求进行修改的。
上述字幕显示参数包括分辨率大小、字体大小、字体颜色、字幕显示位置等。其中，
分辨率大小包括：1920*1080、1366*768、1280*720、848*480、640*480
字体大小包括：大、中、小
字体颜色包括：白、黑、灰、黄、绿、蓝
字幕显示位置包括：横向显示在屏幕下部、横向显示在屏幕上部、竖向显示在屏幕右侧、竖向显示在屏幕左侧等。
字幕文件中也包含有时间信息，这就为与待播放媒体信息的解码数据流进行合成提供了基础。为了便于理解，下面对字幕文件的相关概念进行简单地介绍。字幕文件一般包括图形格式字幕以及文本格式字幕。其中，图形格式字幕由idx和sub文件组成，idx相当于索引文件，里面包括了字幕出现的时间码和字幕显示的属性，sub文件就是字幕数据本身。文本格式字幕的扩展名通常是srt、smi、ssa或sub(与图形格式后缀一样，但数据格式不同)，其中srt文本字幕是最流行的，因为其制作和修改非常简单：一句时间代码+一句字幕。如，对于下述srt字幕文件内容：
45
00：02：52,184--＞00：02：53,617
慢慢来
表示：第45行字幕，显示时间从音视频开始的第2分52.184秒到第2分53.617秒，字幕内容为：慢慢来。
因此，在合成数据流的生成过程中，可以根据解码数据流与字幕内容中各自包含的时间信息之间的对应关系(如数据流与字幕内容属性中的时间戳一致)，以及字幕显示参数属性，将解码数据流与对应的字幕内容叠加在一起。
步骤S105：播放输出上述合成数据流。
本优选方法实施例根据字幕文件的字符集、字幕格式与智能电视媒体播放器之间的匹配程度确定待合成字幕文件，并根据媒体播放器的有效显示参数合成字幕内容与媒体数据流，可有效控制字幕的大小、颜色和分辨率等，使得字幕内容以最佳效果显示。
在本方法实施例进一步的优选实施例中，还包括：
字幕显示参数调整步骤S100：接收用户选择或输入的字幕显示参数，并将 该字幕显示参数作为新的预设字幕显示参数。
上述字幕显示参数调整步骤S100可以在媒体播放器启动后的任何时机执行，当字幕显示参数修改生效后，可采用下述任一个方案执行：
方案一：正在播放的媒体按原有字幕显示参数执行，新字幕显示参数在播放下一个媒体时生效；
方案二：动态调整后续媒体片段；对于后续播放的媒体片段，在合成播放数据流时，采用新调整的字幕显示参数将字幕内容按相应的时间叠加到解码数据流中。
对于前述的各方法实施例，为了描述简单，故将其都表述为一系列的动作组合，但是本领域的技术人员应该知悉，本申请并不受所描述的动作顺序的限制，因为根据本申请，某些步骤可以采用其他顺序或同时执行，以步骤S103为例，该查找并解析字幕文件步骤可以在步骤S101和S102之后执行，也可以步骤S101之前或S101与S102之间执行，还可以与步骤S101同时执行；其次，本领域技术人员也应该知悉，上述方法实施例均属于优选实施例，所涉及的动作和模块并不一定是本申请所必须的。
本申请还公开了一种在其上记录有用于执行上述方法的程序的计算机可读记录介质。所述计算机可读记录介质包括配置为以计算机(以计算机为例)可读的形式存储或传送信息的任何机制。例如，机器可读介质包括只读存储器(ROM)、随机存取存储器(RAM)、磁盘存储介质、光存储介质、闪速存储介质、电、光、声或其他形式的传播信号(例如，载波、红外信号、数字信号等)等。
参照图3，示出了本申请智能电视媒体播放器第一实施例的结构框图，包括媒体获取模块31、字幕查找解析模块32、匹配判断模块33、媒体合成模块34、媒体播放模块35和参数设置模块30等，其中：
媒体获取模块31配置为读取待播放媒体信息并进行解码后，将得到的解码数据流保存至播放缓冲区。
字幕查找解析模块32配置为查找并解析与待播放媒体信息对应的字幕文件。
匹配判断模块33配置为根据字幕查找解析模块32获得的字幕文件与待播放媒体信息及媒体播放器平台的匹配程度，确定待合成字幕文件。
其中，匹配判断模块33具体包括：
判断模块331：配置为判断字幕查找解析模块32获得的字幕文件与待播放媒体信息及媒体播放器平台的匹配程度。
用户选择模块330：配置为根据判断模块331的输出结果，按匹配度从大到小的顺序排列字幕文件，提示并接收用户的选择。
第一匹配模块332：配置为根据判断模块331的判断结果确定待合成字幕文件；当字幕文件与待播放媒体信息及媒体播放器平台完全匹配时，将该完全匹配的字幕文件作为待合成字幕文件；当字幕文件与待播放媒体信息及媒体播放器平台不完全匹配时，调用用户选择模块330接收用户的选择，并将用户选择的字幕文件作为待合成字幕文件。
媒体合成模块34：配置为根据媒体播放器的预设字幕显示参数，将待合成字幕文件解码后的字幕内容按相应的时间叠加到解码数据流中，生成合成数据流；
其中，所述字幕显示参数包括字体大小、字体颜色和字幕显示位置；
媒体播放模块35：配置为对媒体合成模块34生成的合成数据流进行播放输出。
参数设置模块30：配置为接收用户选择或输入的字幕显示参数，并将该字幕显示参数作为新的预设字幕显示参数。
参照图4，示出了本申请智能电视媒体播放器第二实施例的结构框图，本装置实施例与上述第一装置实施例的区别在于，匹配判断模块33具体包括如下模块：
判断模块331：配置为判断所述字幕文件与待播放媒体信息及媒体播放器平台的匹配程度；
第二匹配模块333：配置为根据判断模块331的判断结果，确定待合成字幕文件；当字幕文件与待播放媒体信息及媒体播放器平台完全匹配时，将该完全匹配的字幕文件作为待合成字幕文件；当字幕文件与待播放媒体信息及媒体播放器平台不完全匹配时，选择匹配度最大的字幕文件作为待合成字幕文件。
另外，本申请还公开了一种包括有上述媒体播放器的智能电视，可播放存储于本地和外接存储设备中的音、视频文件以及存储于媒体服务器上的流媒体 数据，该智能电视还包括：
主芯片：采用一体化智能电视主芯片，主频不低于800M，ARM架构，带DSP(视频硬解码)；
内存：采用不低于256MB的DDR2；
内部存储设备：采用Nand闪存或EMC闪存，容量不低于2G；
外部设备接口：包括至少4个USB口，可连接U盘、移动硬盘、键盘、鼠标、无线键鼠接收器、WIFI无线网卡、游戏手柄等；
遥控器：至少具有上、下、左、右、确认、返回、菜单、home、0-9数字键等按键
液晶显示屏：分辨率不低于1280*720。
需要说明的是，上述装置实施例属于优选实施例，所涉及的模块并不一定是本申请所必须的。
本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。对于本申请的装置实施例而言，由于其与方法实施例基本相似，所以描述的比较简单，相关之处参见方法实施例的部分说明即可。
以上对本申请所提供的一种智能电视媒体播放器及其字幕处理方法，以及一种智能电视，进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (14)

  1. 一种智能电视媒体播放器的字幕处理方法，包括：
    读取待播放媒体信息并进行解码后，将得到的解码数据流保存至播放缓冲区；
    查找并解析与所述待播放媒体信息对应的字幕文件；
    根据所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度，确定待合成字幕文件；
    根据所述媒体播放器的预设字幕显示参数，将所述待合成字幕文件解码后的字幕内容按相应的时间叠加到解码数据流中，生成合成数据流；其中，所述字幕显示参数包括分辨率大小、字体大小、字体颜色和字幕显示位置；
    播放输出所述合成数据流。
  2. 如权利要求1所述的智能电视媒体播放器的字幕处理方法，其中，所述查找与所述待播放媒体信息对应的字幕文件的方法，至少包括以下三种方式中的一种：
    将文件主体名称与待播放媒体信息的名称相同的字幕文件作为该待播放媒体信息的关联字幕文件；
    将文件名称中包含待播放媒体信息的名称的字幕文件作为该待播放媒体信息的关联字幕文件；
    将文件内容中包含待播放媒体信息的名称的字幕文件作为该待播放媒体信息的关联字幕文件。
  3. 如权利要求1所述的智能电视媒体播放器的字幕处理方法，其中，所述根据所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度，确定待合成字幕文件，具体包括：
    判断所述字幕文件与所述待播放媒体信息及媒体播放器平台是否完全匹配；
    如果是，则将该完全匹配的字幕文件作为待合成字幕文件；否则，按匹配度从大到小的顺序排列字幕文件，提示用户进行选择，并将用户选择的字幕文件作为待合成字幕文件。
  4. 如权利要求1所述的智能电视媒体播放器的字幕处理方法，其中，所 述根据所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度，确定待合成字幕文件，具体包括：
    判断所述字幕文件与所述待播放媒体信息及媒体播放器平台是否完全匹配；如果是，则将该完全匹配的字幕文件作为待合成字幕文件；否则选择匹配度最大的字幕文件作为待合成字幕文件。
  5. 如权利要求3或4所述的智能电视媒体播放器的字幕处理方法，其中，判断所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度的方法具体包括：
    根据所述字幕文件的主体名称与待播放媒体信息的匹配程度和预设的权重比例，以及，根据所述字幕文件的后缀名称和次后缀名称与媒体播放器平台的匹配程度和预设的权重比例，计算所述字幕文件的匹配度值；
    其中，匹配度值越大，表示字幕文件的匹配程度越高；匹配度值满分时为完全匹配。
  6. 如权利要求5所述的智能电视媒体播放器的字幕处理方法，其中，所述字幕文件的匹配度值的计算方法具体包括：
    判断所述字幕文件的主体名称与所述待播放媒体信息的名称是否相同或具有包含关系，根据判断结果从字幕文件与待播放媒体信息主体名称关联关系对照表查表获得所述字幕文件的主体名称权值；
    根据所述字幕文件的后缀名称、次后缀名称，分别从字幕文件类型与媒体播放器平台关联关系对照表、字幕文件语言类别与媒体播放器平台关联关系对照表查表获得相应的后缀名称权值和次后缀名称权值；
    将上述主体名称权值、后缀名称权值、次后缀名称权值累加后的值作为所述字幕文件的匹配度值。
  7. 如权利要求6所述的智能电视媒体播放器的字幕处理方法，其中，还包括对所述字幕文件的主体名称、后缀名称、次后缀名称的权值的动态调整过程，具体为：
    按字幕文件的主体名称与待播放媒体信息名称是否相同或有包含关系、字幕文件后缀名称和次后缀名称分类统计用户在一段时间内选择的字幕文件数量，将超过预设阈值的项目的权值增加5～20。
  8. 如权利要求1所述的智能电视媒体播放器的字幕处理方法，其中，还包括：
    接收用户选择或输入的字幕显示参数，并将该字幕显示参数作为新的预设字幕显示参数。
  9. 一种智能电视媒体播放器，包括：
    媒体获取模块，配置为读取待播放媒体信息并进行解码后，将得到的解码数据流保存至播放缓冲区；
    字幕查找解析模块，配置为查找并解析与所述待播放媒体信息对应的字幕文件；
    匹配判断模块，配置为根据所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度，确定待合成字幕文件；
    媒体合成模块，配置为根据所述媒体播放器的预设字幕显示参数，将所述待合成字幕文件解码后的字幕内容按相应的时间叠加到解码数据流中，生成合成数据流；其中，所述字幕显示参数包括分辨率大小、字体大小、字体颜色和字幕显示位置；
    媒体播放模块，配置为对所述合成数据流进行播放输出。
  10. 如权利要求9所述的智能电视媒体播放器，其中，所述匹配判断模块具体包括：
    判断模块，配置为判断所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度；
    用户选择模块，配置为根据判断模块的输出结果，按匹配度从大到小的顺序排列字幕文件，提示并接收用户的选择；
    第一匹配模块，配置为根据判断模块的判断结果确定待合成字幕文件；当所述字幕文件与所述待播放媒体信息及媒体播放器平台完全匹配时，将该完全匹配的字幕文件作为待合成字幕文件；当所述字幕文件与所述待播放媒体信息及媒体播放器平台不完全匹配时，调用用户选择模块接收用户的选择，并将用户选择的字幕文件作为待合成字幕文件。
  11. 如权利要求9所述的智能电视媒体播放器，其中，所述匹配判断模块具体包括：
    判断模块，配置为判断所述字幕文件与所述待播放媒体信息及媒体播放器平台的匹配程度；
    第二匹配模块，配置为根据判断模块的判断结果，确定待合成字幕文件；当所述字幕文件与所述待播放媒体信息及媒体播放器平台完全匹配时，将该完全匹配的字幕文件作为待合成字幕文件；当所述字幕文件与所述待播放媒体信息及媒体播放器平台不完全匹配时，选择匹配度最大的字幕文件作为待合成字幕文件。
  12. 如权利要求9至11任一所述的智能电视媒体播放器，还包括：
    参数设置模块，配置为接收用户选择或输入的字幕显示参数，并将该字幕显示参数作为新的预设字幕显示参数。
  13. 一种智能电视，包括权利要求9至12任一所述的智能电视媒体播放器。
  14. 一种在其上记录有用于执行权利要求1所述方法的程序的计算机可读记录介质。
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