WO2016091011A1 - 字幕切换方法及装置 - Google Patents

字幕切换方法及装置 Download PDF

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Publication number
WO2016091011A1
WO2016091011A1 PCT/CN2015/092210 CN2015092210W WO2016091011A1 WO 2016091011 A1 WO2016091011 A1 WO 2016091011A1 CN 2015092210 W CN2015092210 W CN 2015092210W WO 2016091011 A1 WO2016091011 A1 WO 2016091011A1
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WO
WIPO (PCT)
Prior art keywords
data
caption
subtitle
video
time stamp
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PCT/CN2015/092210
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English (en)
French (fr)
Inventor
江中央
周文杰
王甜甜
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深圳Tcl数字技术有限公司
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Application filed by 深圳Tcl数字技术有限公司 filed Critical 深圳Tcl数字技术有限公司
Priority to US15/535,067 priority Critical patent/US20170353770A1/en
Priority to EP15867670.0A priority patent/EP3232676A4/en
Publication of WO2016091011A1 publication Critical patent/WO2016091011A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47End-user applications
    • H04N21/488Data services, e.g. news ticker
    • H04N21/4884Data services, e.g. news ticker for displaying subtitles
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • H04N21/4302Content synchronisation processes, e.g. decoder synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • H04N21/433Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4331Caching operations, e.g. of an advertisement for later insertion during playback
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • H04N21/434Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4341Demultiplexing of audio and video streams
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • H04N21/435Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • H04N21/438Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4383Accessing a communication channel
    • H04N21/4384Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • H04N21/439Processing of audio elementary streams
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • H04N21/44Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44004Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845Structuring of content, e.g. decomposing content into time segments
    • H04N21/8456Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments

Definitions

  • the present invention relates to the field of Internet television, and in particular, to a method and device for switching subtitles.
  • subtitles in different languages are embedded in the video files of the programs.
  • Many programs also provide Chinese and English subtitles.
  • the general subtitle switching process is as follows:
  • Subtitle1 subtitle with language type A is currently playing; when the user switches to Subtitle2 subtitle with language type B:
  • the data of the Subtitle2 subtitle is sent to the cache A1, and the data cache module sends the data of the cache A1 to the subtitle decoder module;
  • the subtitle decoder module performs decoding after receiving the data of the Subtitle2 subtitle. After synchronizing the decoded subtitle data with audio or video, output to the output module;
  • the output module After receiving the decoded subtitle data, the output module performs output display, and the subtitle switching ends.
  • a main object of the present invention is to provide a caption switching method and apparatus, which aims to solve the technical problem that the existing caption switching method needs to wait for a period of time when switching subtitles, and causes a picture to be stuck.
  • the present invention provides a caption switching method, and the caption switching method includes the following steps:
  • the caption switching method includes the following steps:
  • the method before the step of receiving the caption switching instruction input by the user, the method further includes:
  • the decoded video and audio data is outputted in synchronization with the currently played language subtitle data.
  • the method further includes:
  • the subtitle data to be switched stored in the corresponding preset buffer is obtained, and the current display time stamp of the video data in the playback is obtained.
  • the method further includes:
  • the method before the step of outputting the caption data in which the time stamp is equal to the current display time stamp in the caption data to be switched, the method further includes:
  • the present invention further provides a caption switching device, where the caption switching device includes:
  • a receiving module configured to receive a subtitle switching instruction input by a user
  • An acquiring module configured to acquire, in a corresponding preset buffer, a current display timestamp of the to-be-switched caption data corresponding to the caption switching instruction and the video and audio data in play;
  • an output module configured to output and display the subtitle data whose time stamp is equal to the current display time stamp in the subtitle data to be switched.
  • the caption switching device further includes:
  • a demultiplexing module configured to demultiplex the audio and video files to obtain video and audio data and an array of subtitle data corresponding to the audio and video data
  • a data buffering module configured to store the video and audio data and the array of subtitle data in a corresponding preset buffer
  • a decoding module configured to decode the video data and the subtitle data of the current language in the array subtitle data
  • the output module is further configured to output the decoded video and audio data in synchronization with the subtitle data of the current language.
  • the caption switching device further includes:
  • a determining module configured to determine whether the subtitle data to be switched is subtitle data of the current language
  • the output module is specifically configured to output the currently displayed subtitle data.
  • the caption switching device further includes:
  • a clearing module configured to clear the caption data in the caption data to be switched that has a timestamp smaller than the current display timestamp.
  • the decoding module is further configured to decode the subtitle data in the subtitle data to be switched that has a time stamp equal to the current display time stamp.
  • the caption switching method and device of the present invention caches subtitles in all languages when the video file is played, and saves the timestamp of the non-currently playing language subtitle data in the buffer by less than the timestamp of the currently played video data.
  • 1 is a schematic block diagram of a conventional caption switching method
  • FIG. 2 is a schematic block diagram of a principle of a caption switching method according to the present invention.
  • FIG. 3 is a flowchart of a first embodiment of a caption switching method according to the present invention.
  • FIG. 4 is a flowchart of a second embodiment of a caption switching method according to the present invention.
  • FIG. 5 is a flowchart of a third embodiment of a caption switching method according to the present invention.
  • FIG. 6 is a flowchart of a fourth embodiment of a caption switching method according to the present invention.
  • FIG. 7 is a flowchart of a fifth embodiment of a caption switching method according to the present invention.
  • Figure 8 is a block diagram of a first embodiment of a caption switching device of the present invention.
  • FIG. 9 is a structural diagram of a second embodiment of a caption switching apparatus according to the present invention.
  • FIG. 10 is a structural diagram of a third embodiment of a caption switching apparatus according to the present invention.
  • Figure 11 is a block diagram of a fourth embodiment of a caption switching device of the present invention.
  • the subtitles of all languages are cached.
  • the switched subtitles are connected to the currently displayed video picture as soon as possible, and the minimum TS2 of the subtitle data of the non-currently played subtitles such as Subtile2 and Subtile3.
  • the present invention provides a caption switching method.
  • the caption switching method includes the following steps:
  • Step S11 Receive a caption switching instruction input by the user.
  • the subtitles displayed by default are not the subtitles that they need, and the subtitles can be switched by using a device such as a remote controller.
  • the caption switching function is selected, and the required caption type is selected in the pop-up option list to generate a caption switching instruction, and when the caption switching instruction is detected, the caption switching instruction is received.
  • Step S12 Acquire a current display timestamp of the to-be-switched caption data and the video and audio data being played in the corresponding preset buffer corresponding to the caption switching instruction.
  • the subtitle data to be switched is stored in a corresponding preset buffer, and each subtitle data has a corresponding preset buffer, that is, different The subtitle data is stored in different preset buffers.
  • the current display time stamp of the video data (including the video data and the audio data) being played is obtained, that is, the time stamp of the currently played data frame in the video data is obtained.
  • Step S13 Perform output display on the subtitle data of the subtitle data to be switched that has a time stamp equal to the current display time stamp.
  • the data frame of the data frame in the subtitle data to be switched is equal to the data of the time stamp corresponding to the currently played data frame, and is output and displayed, so that the switched subtitle matches the current play video data.
  • the captions of all languages are cached when the video file is played, and the time stamp of the non-currently playing language caption data in the buffer is smaller than the timestamp stored data of the currently played video data. And outputting and displaying the data of the time stamp of the subtitle data to be switched in the buffer equal to the time stamp of the currently played video data, so that the content of the data frame of the switched subtitle data matches the content of the currently played data frame.
  • the subtitle switching is smoother and there is no sticking phenomenon.
  • FIG. 4 is a flowchart of a second embodiment of a caption switching method according to the present invention.
  • the method before the step of receiving the caption switching instruction input by the user, the method further includes:
  • Step S21 Demultiplexing the video and audio files to obtain video and audio data and array subtitle data corresponding to the audio and video data;
  • Step S22 storing the video and audio data and the array of subtitle data in a corresponding preset buffer
  • Step S23 decoding the video data and the subtitle data of the current language
  • Step S24 Synchronously output the decoded video and audio data with the subtitle data of the current language.
  • the video file playback instruction when the video file playback instruction is received, the video file is first demultiplexed to separate the array caption data and the video data in the video file; and then the video data is stored in the corresponding buffer. At the same time, the array subtitle data is respectively stored in the corresponding buffer; then, the video file is decoded, and the subtitle data of the current language preset in the array subtitle data is decoded, and finally, the audio and video data is displayed at the same time. Output the corresponding subtitle data of the current language.
  • FIG. 5 is a flowchart of a third embodiment of a caption switching method according to the present invention.
  • the method further includes:
  • Step S31 determining whether the subtitle data to be switched is subtitle data of the current language
  • step S32 If yes, go to step S32; if no, go to step S12.
  • Step S32 continuing to output and display the currently played language subtitle data
  • Step S12 Acquire subtitle data to be switched stored in the corresponding preset buffer, and obtain a current display timestamp of the video and audio data being played.
  • the selected subtitle data to be switched is the preset subtitle data of the current language, and if yes, continuing to display the current playback language subtitle data, if not, performing the step S12.
  • FIG. 6 is a flowchart of a fourth embodiment of a caption switching method according to the present invention.
  • the method further includes:
  • Step S41 clearing the caption data in the caption data to be switched that is smaller than the current display timestamp.
  • FIG. 7 is a flowchart of a fifth embodiment of a caption switching method according to the present invention.
  • the method before the step of outputting the caption data in which the time stamp is equal to the current display time stamp in the caption data to be switched, the method further includes:
  • Step S51 Decode the caption data of the subtitle data to be switched that has a timestamp greater than or equal to the current display timestamp.
  • the subtitle data in the subtitle data to be switched is equal to the subtitle data of the current display time stamp.
  • the decoding operation can be displayed in the number of subtitles.
  • the present invention further provides a caption switching device.
  • the caption switching device includes:
  • the receiving module 101 is configured to receive a subtitle switching instruction input by a user.
  • the subtitles displayed by default are not the subtitles that they need, and the subtitles can be switched by using a device such as a remote controller.
  • the caption switching function is selected, and the required caption type is selected in the pop-up option list to generate a caption switching instruction, and when the caption switching instruction is detected, the caption switching instruction is received.
  • the obtaining module 102 is configured to acquire the subtitle data to be switched stored in the corresponding preset buffer, and obtain the current display time stamp of the video and audio data being played.
  • the subtitle data to be switched is stored in a corresponding preset buffer, and each subtitle data has a corresponding preset buffer, that is, different The subtitle data is stored in different preset buffers.
  • the current display time stamp of the video data being played is obtained, that is, the time stamp of the currently played data frame in the video data is obtained.
  • the output module 103 is configured to output and display the subtitle data whose time stamp is equal to the current display time stamp in the subtitle data to be switched.
  • the data of the data frame in the subtitle data to be switched is equal to the data of the time stamp corresponding to the currently played data frame, and is output and displayed.
  • the caption switching device of the embodiment caches the captions of all languages by playing the video file, and clears the time stamp of the caption data in the buffer by less than the time stamped data of the currently played video data, and buffers the buffer data.
  • the time stamp of the subtitle data in the area is equal to the data of the time stamp of the currently played video data, and is output and displayed, so that the content of the data frame of the switched subtitle data matches the content of the currently played data frame, thereby making the subtitle switching more Smooth and no carding phenomenon.
  • FIG. 9 is a structural diagram of a second embodiment of a caption switching apparatus according to the present invention.
  • the caption switching device further includes:
  • the demultiplexing module 201 is configured to demultiplex the video and audio files to obtain video and audio data and array subtitle data corresponding to the video and audio data.
  • the data cache module 202 is configured to store the video data and the array of subtitle data in a corresponding preset buffer.
  • the data cache module 202 includes: a plurality of subtitle buffer units 222, The array caption data is stored in a corresponding preset buffer; the video buffer unit 224 is configured to store the video data in a corresponding preset buffer.
  • a decoding module 203 configured to decode the video data and the subtitle data of the current language in the array of subtitle data; preferably, the decoding module 203 includes: a subtitle decoding unit 232, configured to use the current language The caption data is decoded; the video and audio decoding unit 234 is configured to decode the video data.
  • the output module 103 is further configured to output the decoded video and audio data in synchronization with the subtitle data of the current language.
  • the video file playback instruction when the video file playback instruction is received, the video file is first demultiplexed to separate the array caption data and the video data in the video file; and then the video data is stored in the corresponding buffer. At the same time, the array subtitle data is respectively stored in the corresponding buffer; then, the video file is decoded, and the subtitle data of the current language preset in the array subtitle data is decoded, and finally, the audio and video data is displayed at the same time. Output the corresponding subtitle data of the current language.
  • FIG. 10 is a structural diagram of a third embodiment of a caption switching apparatus according to the present invention.
  • the caption switching device further includes:
  • the determining module 301 is configured to determine whether the caption data to be switched is caption data of the current language
  • the output module 104 is further configured to output the currently displayed caption data.
  • the selected subtitle data to be switched is the preset subtitle data of the current language, and if yes, continuing to display the subtitle data of the current language, if not, acquiring the storage
  • the subtitle data to be switched in the corresponding preset buffer is simultaneously obtained as the current display time stamp of the video and audio data being played.
  • FIG. 11 is a structural diagram of a fourth embodiment of a caption switching apparatus according to the present invention.
  • the clearing module 401 is configured to clear the caption data in which the timestamp in the to-be-switched caption data is smaller than the current display timestamp.
  • the decoding module 203 is further configured to: perform to clear the caption data in which the timestamp in the to-be-switched caption data is greater than or equal to the current display timestamp.
  • the subtitle data in the subtitle data to be switched is equal to the subtitle data of the current display time stamp.
  • the decoding operation can be displayed with subtitle data.
  • the caption switching method and apparatus of the present embodiment caches subtitles in all languages when the video file is played, and clears the time stamp of the caption data in the buffer by less than the time stamp of the currently played video data. And storing the data, and outputting and displaying the data of the time stamp of the caption data in the buffer equal to the time stamp of the currently played video data, so that the content of the data frame of the switched caption data is related to the content of the currently played data frame. Matching, which makes the subtitle switching smoother, and does not appear to be stuck.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Systems (AREA)

Abstract

本发明公开一种字幕切换方法及装置,所述字幕切换方法包括以下步骤:接收用户输入的字幕切换指令;获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳;将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示。本发明通过在影音文件播放时,对所有语言的字幕进行缓存,并通过清除缓冲区中非当前播放语言字幕数据的时间戳小于当前播放的影音数据的时间戳的存储数据,并将待切换字幕数据的时间戳等于当前播放的影音数据的时间戳的数据进行输出显示,以使得切换后的字幕数据的数据帧的内容与当前播放的数据帧的内容相匹配,使得字幕切换较为平滑,且不会出现顿卡现象。

Description

字幕切换方法及装置
技术领域
本发明涉及互联网电视领域,尤其涉及一种字幕切换方法及装置。
背景技术
在很多国家和地区,尤其是欧洲的一些视频内容服务商,为了更好地为不同语言国家的人们提供视频点播节目服务,在节目的视频文件里面都嵌入了不同语言的字幕。人们在观看节目的时候,通过遥控器,进行不同语言字幕的切换。例如在中国看大片的时候, 很多节目同时提供了中文及英文字幕。如图1所示,一般字幕切换流程如下:
当前正在播放语言类型为A的Subtitle1字幕;当用户切换到语言类型为B的Subtitle2字幕时:
首先,停止将Subtile1字幕的数据送入缓存A1, 清空缓存A1, 并通过对字幕解码器模块进行flush操作来清空字幕解码器模块缓存的数据;
接着,将Subtitle2字幕的数据送入缓存A1, 数据缓存模块将缓存A1的数据送入字幕解码器模块;
然后,字幕解码器模块在接收到Subtitle2字幕的数据后,进行解码。对解码后的字幕数据与音频或者视频在时间上进行同步后,输出到输出模块;
最终,输出模块在接收到解码后的字幕数据后,进行输出显示,字幕切换结束。
从上面流程可以看出,在进行字幕切换的时候,字幕Subtile1的缓存A1中的数据和字幕解码模块的数据被清空后,从TS1时刻送入Subtile2的字幕数据,因此,较音频或者视频而言,少了(TS1- TS3)时长的数据,其中TS3为节目的pts(present time stamp,当前显示时间戳)时间。因此,切换字幕过程中,需要等待(TS1- TS3)长的时间才能看到切换后的字幕内;另一方面,由于字幕的时长和音视频的时长不匹配,在进行字幕、音频和视频同步输出的过程中,有时候还会出现画面的卡顿问题。
发明内容
本发明的主要目的在于提供一种字幕切换方法及装置,旨在解决现有的字幕切换方法在切换字幕时需要等待一段时间、且会导致画面卡顿的的技术问题。
为实现上述目的,本发明提供一种字幕切换方法,所述字幕切换方法包括以下步骤:
所述字幕切换方法包括以下步骤:
接收用户输入的字幕切换指令;
获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳;
将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示。
优选地,在所述接收用户输入的字幕切换指令的步骤之前,还包括:
对影音文件进行解复用,得到影音数据及对应所述影音数据的数组字幕数据;
将所述影音数据与所述数组字幕数据存储于对应的预设缓冲区内;
将所述影音数据与所述数组字幕数据中的当前播放语言的字幕数据进行解码;
将解码后的影音数据与当前播放的语言字幕数据同步输出显示。
优选地,在所述接收用户输入的字幕切换指令步骤之后,还包括:
判断待切换的字幕数据是否是当前播放的语言字幕数据;
如果是,则继续输出显示当前播放的语言字幕数据;
如果否,则获取存储于对应的预设缓冲区中的待切换字幕数据及获取播放中的影音数据的当前显示时间戳。
优选地,在获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳步骤之后,还包括:
清除所述待切换字幕数据中时间戳小于所述当前显示时间戳的字幕数据。
优选地,在将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示步骤之前,还包括:
将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行解码。
此外,为了实现上述目的,本发明还提供一种字幕切换装置,所述字幕切换装置包括:
接收模块,用于接收用户输入的字幕切换指令;
获取模块,用于获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳;
输出模块,用于将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示。
优选地,所述字幕切换装置还包括:
解复用模块,用于对影音文件进行解复用,得到影音数据及对应所述影音数据的数组字幕数据;
数据缓存模块,用于将所述影音数据与所述数组字幕数据存储于对应的预设缓冲区内;
解码模块,用于将所述影音数据与所述数组字幕数据中的当前语言的字幕数据进行解码;
所述输出模块,还用于将解码后的影音数据与当前语言的字幕数据同步输出显示。
优选地,所述字幕切换装置还包括:
判断模块,用于判断待切换的字幕数据是否是所述当前语言的字幕数据;
所述输出模块,具体用于输出当前显示的字幕数据。
优选地,所述字幕切换装置还包括:
清除模块,用于清除所述待切换字幕数据中时间戳小于所述当前显示时间戳的字幕数据。
优选地,所述解码模块,还用于将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行解码。
本发明的字幕切换方法及装置,通过在影音文件播放时,对所有语言的字幕进行缓存,并通过清除缓冲区中非当前播放语言字幕数据的时间戳小于当前播放的影音数据的时间戳的存储数据,并将缓冲区中待切换字幕数据的时间戳等于当前播放的影音数据的时间戳的数据进行输出显示,以使得切换后的字幕数据的数据帧的内容与当前播放的数据帧的内容相匹配,进而使得字幕切换较为平滑,且不会出现顿卡现象。
附图说明
图1为现有的字幕切换方法的原理示意框图;
图2为本发明字幕切换方法的原理示意框图;
图3为本发明字幕切换方法的第一实施例的流程图;
图4为本发明字幕切换方法的第二实施例的流程图;
图5为本发明字幕切换方法的第三实施例的流程图;
图6为本发明字幕切换方法的第四实施例的流程图;
图7为本发明字幕切换方法的第五实施例的流程图;
图8为本发明字幕切换装置的第一实施例的构架图;
图9为本发明字幕切换装置的第二实施例的构架图;
图10为本发明字幕切换装置的第三实施例的构架图;
图11为本发明字幕切换装置的第四实施例的构架图。
本发明目的实现、功能特点及优点将结合实施例,参照附图做进一步说明。
具体实施方式
应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
为了解决多字幕切换过程需要等待一段时间及切换过程中画面卡顿的问题,如图2所示,在对视频文件进行解复用后,对所有语言的字幕进行缓存。为了更平滑和快速地实现字幕切换,尽快实现切换后的字幕与当前显示的视频画面进行衔接,非当前播放的字幕例如Subtile2和Subtile3的缓冲区字幕数据的最小TS2(time stamp, 时间戳)需要等于视频或者音频的当前显示时间戳pts(其中pts=TS3),即TS2等于TS3才能实现切换后的字幕与当前的音视频进行无缝的衔接,实现快速而平滑的字幕切换,因此,非当前播放字幕的缓存B1、缓存B2缓存数据的时间长度duration1的大小为(pts – TS1)。
基于上述原理,本发明提供一种字幕切换方法,参照图3,在一实施例中,所述字幕切换方法包括以下步骤:
步骤S11、接收用户输入的字幕切换指令。
当户用在观看影音文件时,发现默认显示的字幕不是自己需要的字幕,则可通过遥控器等设备进行字幕切换。具体地,选择字幕切换功能,并在弹出的可选项列表中选择需求的字幕类型,生成字幕切换指令,当检测到该字幕切换指令时,接收该字幕切换指令。
步骤S12、获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳。
根据字幕切换指令,获取对应用户选择的字幕类型的待切换字幕数据,所述待切换字幕数据存储于对应的预设缓冲区中,且每一字幕数据具有一对应的预设缓冲区,即不同字幕数据存储于不同的预设缓冲区内。同时,获取正在播放的影音数据(包括视频数据与音频数据)的当前显示时间戳,即获取影音数据中当前播放的数据帧的时间戳。
步骤S13、将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示。
将待切换字幕数据中的数据帧的时间戳等于当前播放的数据帧对应的时间戳的数据进行输出显示,使得切换后的字幕与当前播放时视频数据相匹配。
本实施例的字幕切换方法,通过在影音文件播放时,对所有语言的字幕进行缓存,并通过清除缓冲区中非当前播放语言字幕数据的时间戳小于当前播放的影音数据的时间戳的存储数据,并将缓冲区中待切换字幕数据的时间戳等于当前播放的影音数据的时间戳的数据进行输出显示,以使得切换后的字幕数据的数据帧的内容与当前播放的数据帧的内容相匹配,进而使得字幕切换较为平滑,且不会出现顿卡现象。
进一步地,参照图4,图4为本发明字幕切换方法的第二实施例的流程图。
基于上述实施例,在所述接收用户输入的字幕切换指令的步骤之前,还包括:
步骤S21、对影音文件进行解复用,得到影音数据及对应所述影音数据的数组字幕数据;
步骤S22、将所述影音数据与所述数组字幕数据存储于对应的预设缓冲区内;
步骤S23、将所述影音数据与当前语言的字幕数据进行解码;
步骤S24、将解码后的影音数据与当前语言的字幕数据同步输出显示。
具体地,接收到影音文件播放指令时,首先对影音文件进行解复用,以将所述影音文件中的数组字幕数据、影音数据进行分离;然后,将所述影音数据存储至对应的缓冲区,同时将数组字幕数据分别存储于对应的缓冲区;接着,将影音文件进行解码操作,同时将数组字幕数据中预设的当前语言的字幕数据进行解码操作,最后,在输出显示影音数据的同时输出对应的当前语言的字幕数据。
进一步地,参照图5,图5为本发明字幕切换方法的第三实施例的流程图。
基于上述实施例,在所述接收用户输入的字幕切换指令步骤之后,还包括:
步骤S31、判断待切换的字幕数据是否是当前语言的字幕数据;
如果是,则进入步骤S32;如果否,则进入步骤S12
步骤S32、继续输出显示当前播放的语言字幕数据;
步骤S12、获取存储于对应的预设缓冲区中的待切换字幕数据,同时获取播放中的影音数据的当前显示时间戳。
具体地,当接收到字幕切换指令时,首先判断所选择的待切换的字幕数据是否是预设的当前语言的字幕数据,如果是,则继续显示当前播放语言字幕数据,如果不是,则执行步骤S12,获取存储于对应的预设缓冲区中的待切换字幕数据,同时获取播放中的影音数据的当前显示时间戳。
进一步地,参照图6,图6为本发明字幕切换方法的第四实施例的流程图。
基于上述实施例,在获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳步骤之后,还包括:
步骤S41,清除所述待切换字幕数据中时间戳小于所述当前显示时间戳的字幕数据。
将存储于预设缓冲区中的待切换字幕数据与其他非当前语言的字幕数据中的数据帧的时间戳与当前播放的数据帧的时间戳进行比较,并将待切换字幕数据中的数据帧的时间戳小于当前播放的数据帧的时间戳的数据帧释放。
进一步地,参照图7,图7为本发明字幕切换方法的第五实施例的流程图。
基于上述实施例,在将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示步骤之前,还包括:
步骤S51、将所述待切换字幕数据中时间戳大于或等于所述当前显示时间戳的字幕数据进行解码。
具体地,在将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示之前,将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行解码操作,以字幕数能够显示。
本发明还提供一种字幕切换装置,参照图8,在一实施例中,所述字幕切换装置包括:
接收模块101,用于接收用户输入的字幕切换指令。
当户用在观看影音文件时,发现默认显示的字幕不是自己需要的字幕,则可通过遥控器等设备进行字幕切换。具体地,选择字幕切换功能,并在弹出的可选项列表中选择需求的字幕类型,生成字幕切换指令,当检测到该字幕切换指令时,接收该字幕切换指令。
获取模块102,用于获取存储于对应的预设缓冲区中的待切换字幕数据,同时获取播放中的影音数据的当前显示时间戳。
根据字幕切换指令,获取对应用户选择的字幕类型的待切换字幕数据,所述待切换字幕数据存储于对应的预设缓冲区中,且每一字幕数据具有一对应的预设缓冲区,即不同字幕数据存储于不同的预设缓冲区内。同时,获取正在播放的影音数据的当前显示时间戳,即获取影音数据中当前播放的数据帧的时间戳。
输出模块103,用于将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示。
将待切换字幕数据中的数据帧的时间戳等于当前播放的数据帧对应的时间戳的数据进行输出显示。
本实施例的字幕切换装置,通过在影音文件播放时,对所有语言的字幕进行缓存,并通过清除缓冲区中字幕数据的时间戳小于当前播放的影音数据的时间戳的存储数据,并将缓冲区中字幕数据的时间戳等于当前播放的影音数据的时间戳的数据进行输出显示,以使得切换后的字幕数据的数据帧的内容与当前播放的数据帧的内容相匹配,进而使得字幕切换较为平滑,且不会出现顿卡现象。
进一步地,参照图9,图9为本发明字幕切换装置的第二实施例的构架图。
基于上述实施例,在本实施例中,所述字幕切换装置还包括:
解复用模块201,用于对影音文件进行解复用,得到影音数据及对应所述影音数据的数组字幕数据。
数据缓存模块202,用于将所述影音数据与所述数组字幕数据存储于对应的预设缓冲区内;优选地,所述数据缓存模块202包括:数个字幕缓冲单元222,用于将所述数组字幕数据存储于对应的预设缓冲区内;影音缓冲单元224,用于将所述影音数据存储于对应的预设缓冲区内。
解码模块203,用于将所述影音数据与所述数组字幕数据中的当前语言的字幕数据进行解码;优选地,所述解码模块203包括:字幕解码单元232,用于将所述当前语言的字幕数据进行解码;影音解码单元234,用于将所述影音数据进行解码。
所述输出模块103,还用于将解码后的影音数据与当前语言的字幕数据同步输出显示。
具体地,接收到影音文件播放指令时,首先对影音文件进行解复用,以将所述影音文件中的数组字幕数据、影音数据进行分离;然后,将所述影音数据存储至对应的缓冲区,同时将数组字幕数据分别存储于对应的缓冲区;接着,将影音文件进行解码操作,同时将数组字幕数据中预设的当前语言的字幕数据进行解码操作,最后,在输出显示影音数据的同时输出对应的当前语言的字幕数据。
进一步地,参照图10,图10为本发明字幕切换装置的第三实施例的构架图。
基于上述实施例,在本实施例中,所述字幕切换装置还包括:
判断模块301,用于判断待切换的字幕数据是否是所述当前语言的字幕数据;
所述输出模块104,还用于输出当前显示的字幕数据。
具体地,当接收到字幕切换指令时,首先判断所选择的待切换的字幕数据是否是预设的当前语言的字幕数据,如果是,则继续显示当前语言的字幕数据,如果不是,则获取存储于对应的预设缓冲区中的待切换字幕数据,同时获取播放中的影音数据的当前显示时间戳。
进一步地,参照图11,图11为本发明字幕切换装置的第四实施例的构架图。
基于上述实施例,在本实施例中,清除模块401,用于清除所述待切换字幕数据中时间戳小于所述当前显示时间戳的字幕数据。
将存储于预设缓冲区中的待切换字幕数据中的数据帧的时间戳与当前播放的数据帧的时间戳进行比较,并将待切换字幕数据中的数据帧的时间戳小于当前播放的数据帧的时间戳的数据帧释放。
进一步地,基于上述实施例,在本实施例中,所述解码模块203,还用于将清除所述待切换字幕数据中时间戳大于或等于所述当前显示时间戳的字幕数据进行解码。
具体地,在将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示之前,将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行解码操作,以字幕数据能够显示。
综上所述,本实施例的字幕切换方法及装置,通过在影音文件播放时,对所有语言的字幕进行缓存,并通过清除缓冲区中字幕数据的时间戳小于当前播放的影音数据的时间戳的存储数据,并将缓冲区中字幕数据的时间戳等于当前播放的影音数据的时间戳的数据进行输出显示,以使得切换后的字幕数据的数据帧的内容与当前播放的数据帧的内容相匹配,进而使得字幕切换较为平滑,且不会出现顿卡现象。
以上仅为本发明的优选实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种字幕切换方法,其特征在于,所述字幕切换方法包括以下步骤:
    接收用户输入的字幕切换指令;
    获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳;
    将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示。
  2. 如权利要求1所述的字幕切换方法,其特征在于,在所述接收用户输入的字幕切换指令的步骤之前,还包括:
    对影音文件进行解复用,得到影音数据及对应所述影音数据的数组字幕数据;
    将所述影音数据与所述数组字幕数据存储于对应的预设缓冲区内;
    将所述影音数据与所述数组字幕数据中的当前语言的字幕数据进行解码;
    将解码后的影音数据与当前语言的字幕数据同步输出显示。
  3. 如权利要求2所述的字幕切换方法,其特征在于,在所述接收用户输入的字幕切换指令步骤之后,还包括:
    判断待切换的字幕数据是否是当前语言的字幕数据;
    如果是,则继续输出显示当前语言的字幕数;
    如果否,则获取存储于对应的预设缓冲区中的待切换字幕数据及获取播放中的影音数据的当前显示时间戳。
  4. 如权利要求1所述的字幕切换方法,其特征在于,在获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳步骤之后,还包括:
    清除所述待切换字幕数据中时间戳小于所述当前显示时间戳的字幕数据。
  5. 如权利要求1所述的字幕切换方法,其特征在于,在将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示步骤之前,还包括:
    将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行解码。
  6. 一种字幕切换装置,其特征在于,所述字幕切换装置包括:
    接收模块,用于接收用户输入的字幕切换指令;
    获取模块,用于获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳;
    输出模块,用于将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示。
  7. 如权利要求6所述的字幕切换装置,其特征在于,所述字幕切换装置还包括:
    解复用模块,用于对影音文件进行解复用,得到影音数据及对应所述影音数据的数组字幕数据;
    数据缓存模块,用于将所述影音数据与所述数组字幕数据存储于对应的预设缓冲区内;
    解码模块,用于将所述影音数据与所述数组字幕数据中的当前语言的字幕数据进行解码;
    所述输出模块,还用于将解码后的影音数据与当前语言的字幕数据同步输出显示。
  8. 如权利要求7所述的字幕切换装置,其特征在于,所述字幕切换装置还包括:
    判断模块,用于判断待切换的字幕数据是否是所述当前播放语言的字幕;
    所述输出模块,具体用于输出当前显示的字幕数据。
  9. 如权利要求6所述的字幕切换装置,其特征在于,所述字幕切换装置还包括:
    清除模块,用于清除所述待切换字幕数据中时间戳小于所述当前显示时间戳的字幕数据。
  10. 如权利要求7所述的字幕切换装置,其特征在于,所述解码模块,还用于将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行解码。
  11. 一种字幕切换方法,其特征在于,所述字幕切换方法包括以下步骤:
    对影音文件进行解复用,得到影音数据及对应所述影音数据的数组字幕数据;
    将所述影音数据与所述数组字幕数据存储于对应的预设缓冲区内;
    将所述影音数据与所述数组字幕数据中的当前语言的字幕数据进行解码;
    将解码后的影音数据与当前语言的字幕数据同步输出显示;
    接收用户输入的字幕切换指令;
    获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳;
    清除所述待切换字幕数据中时间戳小于所述当前显示时间戳的字幕数据;
    将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示。
  12. 如权利要求11所述的字幕切换方法,其特征在于,在所述接收用户输入的字幕切换指令步骤之后,还包括:
    判断待切换的字幕数据是否是当前语言的字幕数据;
    如果是,则继续输出显示当前语言的字幕数;
    如果否,则获取存储于对应的预设缓冲区中的待切换字幕数据及获取播放中的影音数据的当前显示时间戳。
  13. 如权利要求11所述的字幕切换方法,其特征在于,在将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示步骤之前,还包括:
    将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行解码。
  14. 一种字幕切换装置,其特征在于,所述字幕切换装置包括:
    解复用模块,用于对影音文件进行解复用,得到影音数据及对应所述影音数据的数组字幕数据;
    数据缓存模块,用于将所述影音数据与所述数组字幕数据存储于对应的预设缓冲区内;
    解码模块,用于将所述影音数据与所述数组字幕数据中的当前语言的字幕数据进行解码;
    所述输出模块,还用于将解码后的影音数据与当前语言的字幕数据同步输出显示;
    接收模块,用于接收用户输入的字幕切换指令;
    获取模块,用于获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳;
    清除模块,用于清除所述待切换字幕数据中时间戳小于所述当前显示时间戳的字幕数据;
    输出模块,用于将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示。
  15. 如权利要求14所述的字幕切换装置,其特征在于,所述字幕切换装置还包括:
    判断模块,用于判断待切换的字幕数据是否是所述当前播放语言的字幕;
    所述输出模块,具体用于输出当前显示的字幕数据。
  16. 如权利要求14所述的字幕切换装置,其特征在于,所述解码模块,还用于将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行解码。
  17. 一种字幕切换方法,其特征在于,所述字幕切换方法包括以下步骤:
    对影音文件进行解复用,得到影音数据及对应所述影音数据的数组字幕数据;
    将所述影音数据与所述数组字幕数据存储于对应的预设缓冲区内;
    将所述影音数据与所述数组字幕数据中的当前语言的字幕数据进行解码;
    将解码后的影音数据与当前语言的字幕数据同步输出显示;
    接收用户输入的字幕切换指令;
    获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳;
    将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行解码;
    将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示。
  18. 如权利要求17所述的字幕切换方法,其特征在于,在所述接收用户输入的字幕切换指令步骤之后,还包括:
    判断待切换的字幕数据是否是当前语言的字幕数据;
    如果是,则继续输出显示当前语言的字幕数;
    如果否,则获取存储于对应的预设缓冲区中的待切换字幕数据及获取播放中的影音数据的当前显示时间戳。
  19. 如权利要求18所述的字幕切换方法,其特征在于,在获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳步骤之后,还包括:
    清除所述待切换字幕数据中时间戳小于所述当前显示时间戳的字幕数据。
  20. 一种字幕切换方法,其特征在于,所述字幕切换方法包括以下步骤:
    接收用户输入的字幕切换指令;
    获取存储于对应的预设缓冲区中与所述字幕切换指令对应的待切换字幕数据及播放中的影音数据的当前显示时间戳;
    清除所述待切换字幕数据中时间戳小于所述当前显示时间戳的字幕数据;
    将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行解码;
    将所述待切换字幕数据中时间戳等于所述当前显示时间戳的字幕数据进行输出显示。
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