CN108513158B - Method and device for playing on-line answering content - Google Patents

Method and device for playing on-line answering content Download PDF

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Publication number
CN108513158B
CN108513158B CN201710107917.5A CN201710107917A CN108513158B CN 108513158 B CN108513158 B CN 108513158B CN 201710107917 A CN201710107917 A CN 201710107917A CN 108513158 B CN108513158 B CN 108513158B
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handwriting
data packet
playing
display resolution
page
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CN108513158A (en
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周巍巍
魏荣宾
张凯磊
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Suzhou Qianwen Wandaba Education Technology Co ltd
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Suzhou Qianwen Wandaba Education 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
    • H04N21/4302—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
    • 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
    • H04N21/439—Processing of audio elementary streams
    • 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
    • H04N21/47214—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 for content reservation or setting reminders; for requesting event notification, e.g. of sport results or stock market
    • 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
    • H04N21/485—End-user interface for client configuration
    • H04N21/4858—End-user interface for client configuration for modifying screen layout parameters, e.g. fonts, size of the windows
    • 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
    • H04N21/81—Monomedia components thereof
    • H04N21/8106—Monomedia components thereof involving special audio data, e.g. different tracks for different languages
    • 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
    • H04N21/8547—Content authoring involving timestamps for synchronizing content

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Business, Economics & Management (AREA)
  • Finance (AREA)
  • Strategic Management (AREA)
  • Databases & Information Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The embodiment of the invention discloses a method and a device for playing on-line answering contents. The method comprises the following steps: acquiring an answering file, wherein the answering file comprises a voice data packet and a handwriting data packet; adaptively adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the resolution of the playing terminal; and drawing and displaying the handwriting according to the handwriting data packet and the display resolution of the handwriting while performing voice playing on the voice data packet. By the technical scheme, the display resolution can be automatically adjusted when the online answering content is played on different equipment, and the stability of the playing effect is improved.

Description

Method and device for playing on-line answering content
Technical Field
The embodiment of the invention relates to an information processing technology, in particular to a method and a device for playing on-line answering contents.
Background
With the continuous development of networks, the teaching mode between teachers and students is developed from off-line to on-line, and the on-line teaching becomes a technical development trend, and the existing on-line answering equipment mainly adopts a mode of combining voice and notes (writing on a blackboard) to provide real-time on-line answering service for teachers and students, namely, the teachers speak and explain the students in real time through voice and communicate with each other through the students, and write on the blackboard for the students through a special answering book and a digital pen at the ends of the teachers.
In addition, on-line answering service, on-site restoration is needed to be carried out on the answering process of teachers and students, and the process needs to be recorded, so that on one hand, students can play back knowledge points and summarize warm troubles to historical answering records in later period; and on the other hand, the method is used for internal examination, namely examining whether the current answerer or student conducts illegal operation, improper speech or unconscious explanation of the teacher and the like, or examining and automatically or manually detecting the current voice call quality and whether handwriting transmission is complete and qualified.
The existing playing scheme is as follows: and downloading the pre-recorded and uploaded voice file and handwriting file stored in the cloud storage server to a terminal such as a mobile phone or a computer, and reading and playing the voice file and the handwriting file by using a special player on the mobile phone or the computer. Because there is the difference of platforms such as IOS and android in the aspect of mobile terminal equipment, moreover based on the android platform, there are thousands of cell-phone products of various cell-phone manufacturers, the device configuration and performance parameter of each kind of product are all different, so can have because the display resolution ratio of equipment is inconsistent and lead to the unstable problem of broadcast effect.
Disclosure of Invention
The embodiment of the invention provides a method and a device for playing online answering contents, which are used for automatically adjusting display resolution and improving the stability of playing effect when the online answering contents are played on different devices.
In a first aspect, an embodiment of the present invention provides a method for playing an online answering content, including:
acquiring an answering file, wherein the answering file comprises a voice data packet and a handwriting data packet;
adaptively adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the resolution of the playing terminal;
and drawing and displaying the handwriting according to the handwriting data packet and the display resolution of the handwriting while performing voice playing on the voice data packet.
Further, after obtaining the answering file, the method further includes:
detecting whether the voice data packet is legal or not;
and if the voice data packet is determined to be legal, loading the voice data packet.
Further, after loading the voice data packet, the method further includes:
detecting whether the handwriting data packet is legal or not;
if the handwriting data packet is determined to be legal, aligning the time of the handwriting data packet with the time of the voice data packet according to a relative time stamp in the handwriting data packet, wherein the relative time stamp is a time difference value of an acquisition time point of the handwriting data packet relative to an acquisition time point of a first voice data packet;
and if the handwriting data packet is determined to be illegal, discarding the voice data packet and the handwriting data packet.
Further, the adaptively adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the resolution of the play terminal includes:
acquiring the equipment pixel ratio of the playing terminal;
and adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the equipment pixel ratio and the set scaling factor.
Further, the adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the device pixel ratio and the set scaling factor includes:
according to the formula: adjusting the display resolution of the handwriting corresponding to the handwriting data packet, wherein f (x, y) is e (x, y) x r (x, y) x scale;
wherein f (x, y) is the coordinate of each pixel point under the display resolution of the adjusted handwriting information, e (x, y) is the coordinate of each pixel point under the display resolution of the handwriting information before adjustment, r (x, y) is a set zoom factor, and scale is the device pixel ratio of the playing terminal.
Further, the drawing and displaying the handwriting according to the handwriting data packet and the display resolution of the handwriting includes:
dynamically creating and displaying a target page according to a page number corresponding to the current handwriting data in the handwriting data packet;
and drawing and displaying the handwriting corresponding to the preset amount of handwriting data on the target page according to the display resolution of the handwriting.
Further, after the handwriting is drawn and displayed according to the handwriting data packet and the display resolution of the handwriting, the method further includes:
when a forward adjustment instruction of the playing progress bar is acquired, adjusting the current playing progress to a front target position forward according to the forward adjustment instruction;
if the page number corresponding to the page displayed at the front target position is the same as the page number corresponding to the page displayed before adjustment, clearing all handwriting in the page number, and drawing and displaying handwriting corresponding to all handwriting data between the initial position under the page number and the front target position;
if the page number corresponding to the page displayed at the front target position is different from the page number corresponding to the page displayed before adjustment, clearing all handwriting in the page number corresponding to the page displayed before adjustment, and drawing and displaying the handwriting corresponding to all handwriting data between the initial position and the front target position under the page number corresponding to the page displayed at the front target position.
Further, after the handwriting is drawn and displayed according to the handwriting data packet and the display resolution of the handwriting, the method further includes:
when a backward adjustment instruction of the playing progress bar is acquired, adjusting the current playing progress backward to a rear target position according to the backward adjustment instruction;
if the page number corresponding to the page displayed at the rear target position is the same as the page number corresponding to the page displayed before adjustment, drawing and displaying handwriting corresponding to all handwriting data between the playing position before adjustment and the rear target position;
and if the page number corresponding to the page displayed at the rear target position is different from the page number corresponding to the page displayed before adjustment, clearing all handwriting in the page number corresponding to the page displayed before adjustment, and drawing and displaying handwriting corresponding to all handwriting data between the lower initial position of the page number corresponding to the page displayed at the rear target position and the rear target position.
In a second aspect, an embodiment of the present invention further provides a device for playing an online answering content, where the device includes:
the device comprises a file acquisition module, a file storage module and a file sending module, wherein the file acquisition module is used for acquiring an answering file, and the answering file comprises a voice data packet and a handwriting data packet;
the resolution adjusting module is used for adaptively adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the resolution of the playing terminal;
and the playing and displaying module is used for drawing and displaying the handwriting according to the handwriting data packet and the display resolution of the handwriting while carrying out voice playing on the voice data packet.
Further, the method also comprises the following steps:
the first detection module is used for detecting whether the voice data packet is legal or not after the answering file is obtained;
and the voice loading module is used for loading the voice data packet if the voice data packet is determined to be legal.
Further, the method also comprises the following steps:
the second detection module is used for detecting whether the handwriting data packet is legal or not after the voice data packet is loaded;
the time alignment module is used for aligning the time of the handwriting data packet with the time of the voice data packet according to a relative time stamp in the handwriting data packet if the handwriting data packet is determined to be legal, wherein the relative time stamp is a time difference value of an acquisition time point of the handwriting data packet relative to an acquisition time point of a first voice data packet;
and the data discarding module is used for discarding the voice data packet and the handwriting data packet if the handwriting data packet is determined to be illegal.
Further, the resolution adjustment module comprises:
the pixel ratio obtaining submodule is used for obtaining the equipment pixel ratio of the playing terminal;
and the resolution determination submodule is used for adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the equipment pixel ratio and the set scaling factor.
Further, the resolution determination sub-module is specifically configured to:
according to the formula: adjusting the display resolution of the handwriting corresponding to the handwriting data packet, wherein f (x, y) is e (x, y) x r (x, y) x scale;
wherein f (x, y) is the coordinate of each pixel point under the display resolution of the adjusted handwriting information, e (x, y) is the coordinate of each pixel point under the display resolution of the handwriting information before adjustment, r (x, y) is a set zoom factor, and scale is the device pixel ratio of the playing terminal.
Further, the playing and displaying module is specifically configured to:
dynamically creating and displaying a target page according to a page number corresponding to the current handwriting data in the handwriting data packet;
and drawing and displaying the handwriting corresponding to the preset amount of handwriting data on the target page according to the display resolution of the handwriting.
Further, the method also comprises the following steps:
the progress forward adjusting module is used for drawing and displaying the handwriting according to the handwriting data packet and the display resolution of the handwriting, and adjusting the current playing progress forward to a front target position according to the forward adjusting instruction when the forward adjusting instruction of the playing progress bar is obtained;
the first forward drawing module is used for clearing all handwriting in the page number and drawing and displaying handwriting corresponding to all handwriting data between the initial position under the page number and the front target position if the page number corresponding to the page displayed at the front target position is the same as the page number corresponding to the page displayed before adjustment;
and the second forward drawing module is used for clearing all handwriting in the page number corresponding to the page displayed before adjustment if the page number corresponding to the page displayed at the front target position is different from the page number corresponding to the page displayed before adjustment, and drawing and displaying the handwriting corresponding to all handwriting data between the starting position and the front target position under the page number corresponding to the page displayed at the front target position.
Further, the method also comprises the following steps:
the progress backward adjustment module is used for adjusting the current playing progress backward to a rear target position according to the backward adjustment instruction when a backward adjustment instruction of the playing progress bar is obtained after the handwriting is drawn and displayed according to the handwriting data packet and the display resolution of the handwriting;
the first backward drawing module is used for drawing and displaying handwriting corresponding to all handwriting data between the playing position before adjustment and the rear target position if the page number corresponding to the page displayed at the rear target position is the same as the page number corresponding to the page displayed before adjustment;
and the second backward drawing module is used for clearing all handwriting in the page number corresponding to the page displayed before the adjustment if the page number corresponding to the page displayed at the rear target position is different from the page number corresponding to the page displayed before the adjustment, and drawing and displaying the handwriting corresponding to all handwriting data between the starting position below the page number corresponding to the page displayed at the rear target position and the rear target position.
According to the embodiment of the invention, the answering file is obtained, the display resolution of the handwriting corresponding to the handwriting data packet in the answering file is adaptively adjusted according to the resolution of the terminal, the handwriting is drawn and displayed according to the display resolution of the handwriting data packet and the display resolution of the handwriting while voice playing is carried out, the advantage of adaptively adjusting the display resolution of the handwriting is utilized, the problem of unstable playing effect caused by inconsistent display resolutions of different devices in the prior art is solved, the display resolution is automatically adjusted when online answering content is played on different devices, and the stability of the playing effect is improved.
Drawings
Fig. 1 is a schematic flowchart of a method for playing an online answering content according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for playing an online answering content according to a second embodiment of the present invention;
fig. 3 is a schematic flow chart of a method for playing an online answering content according to a third embodiment of the present invention;
fig. 4 is a schematic flowchart of a method for playing an online answering content according to a fourth embodiment of the present invention;
fig. 5 is a schematic flowchart of a method for playing an online answering content according to a fifth embodiment of the present invention;
fig. 6 is a schematic flow chart of a method for playing an online answering content according to a sixth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a playing apparatus for online answering content according to a seventh embodiment of the present invention;
fig. 8 is a schematic view of a display screen of a mobile phone playback terminal according to a fifth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart illustrating a method for playing an online answering content according to an embodiment of the present invention. The method is suitable for playing the on-line answering content, can be executed by a playing device of the on-line answering content, can be composed of hardware and/or software, and can be generally integrated in a player and a terminal with a playing function. The method specifically comprises the following steps:
s110, obtaining a question answering file, wherein the question answering file comprises a voice data packet and a handwriting data packet.
Optionally, the obtained answering file may be two types of answering files obtained by the teacher end storing the voice data packet in the answering file in the voice format and storing the handwriting data packet in the answering file in the handwriting format according to the type of the obtained online answering data packet in the online answering process. Optionally, if the answer file is uploaded to the cloud storage server for storage after being formed, and the answer file formed in the same online answer process corresponds to one answer order number, when the answer file is obtained, the corresponding answer file on the cloud storage server may be obtained according to the answer order number and a URL (Uniform Resource Locator) address corresponding to the answer file.
And S120, adaptively adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the resolution of the playing terminal.
Because the resolution of the handwriting point is affected when the contents of the handwriting data packet are played at different playing terminals, optionally, a proper proportion can be calculated by using the resolution of the playing terminal, and then the display resolution of the handwriting corresponding to the handwriting data packet is properly scaled and adjusted according to the proportion, so that the display resolution of the handwriting is adaptively scaled to a proper size, the display resolution of the handwriting is automatically adjusted when the online answering contents are played on different devices, and the stability of the playing effect is improved.
Preferably, the display resolution of the handwriting can be adaptively adjusted according to the width of the display window of the play terminal. For example, if the width of the display window of the playing terminal is 0-240 pixel points, the display resolution of the handwriting corresponding to the handwriting data packet is automatically adjusted to 180 × 240 pixel points (corresponding to the number of wide pixel points × the number of high pixel points); if the width of a display window of the playing terminal is 240-360 pixel points, automatically adjusting the display resolution of the handwriting corresponding to the handwriting data packet to 240 multiplied by 360 pixel points; if the width of a display window of the playing terminal is 360-480 pixel points, automatically adjusting the display resolution of the handwriting corresponding to the handwriting data packet to 360 multiplied by 480 pixel points; if the width of a display window of the playing terminal is 480-640 pixel points, automatically adjusting the display resolution of the handwriting corresponding to the handwriting data packet to 480 multiplied by 640 pixel points; if the width of the display window of the playing terminal is 640 and more than pixel points, automatically adjusting the display resolution of the handwriting corresponding to the handwriting data packet to 640 multiplied by 854 pixel points; if the height of the display window of the playing terminal is 854 pixel points or more, the display resolution of the handwriting corresponding to the handwriting data packet is automatically adjusted to be the same as the resolution of the display window of the playing terminal.
S130, drawing and displaying the handwriting according to the handwriting data packet and the display resolution of the handwriting while performing voice playing on the voice data packet.
Preferably, the handwriting data packet may include a relative timestamp of the acquisition time point of the current handwriting data packet relative to the acquisition time point of the first voice data packet, so that the play terminal completes synchronization of the voice data packet and the handwriting data packet according to the relative timestamp. Illustratively, when the voice data packet is played in a voice mode, the handwriting data packet can find the corresponding drawing and display time stamp according to the corresponding relative time stamp, so that when the time corresponding to the time stamp arrives, the handwriting is drawn and displayed on the playing terminal according to the handwriting data packet and the display resolution of the handwriting obtained after the self-adaptive adjustment.
Optionally, html5 can be used for voice playing and handwriting drawing, wherein handwriting (. pen) can be drawn based on canvas tags, and voice (. mp3) can be played using audio tags.
According to the technical scheme, the answering file is obtained, the display resolution of the handwriting corresponding to the handwriting data packet in the answering file is adaptively adjusted according to the resolution of the terminal, the handwriting is drawn and displayed according to the display resolution of the handwriting data packet and the display resolution of the handwriting while voice playing is carried out, the advantage of adaptively adjusting the display resolution of the handwriting is utilized, the problem that in the prior art, the playing effect is unstable due to the fact that the display resolutions of different devices are inconsistent is solved, the display resolution is automatically adjusted when online answering contents are played on different devices, and the stability of the playing effect is improved.
Example two
Fig. 2 is a flowchart illustrating a method for playing an online answering content according to a second embodiment of the present invention. The present embodiment is optimized based on the above embodiments, and provides a preferable method for playing online answering content, specifically, after obtaining an answering file, the method further includes: detecting whether the voice data packet is legal or not; and if the voice data packet is determined to be legal, loading the voice data packet.
S210, obtaining a question answering file, wherein the question answering file comprises a voice data packet and a handwriting data packet.
S220, detecting whether the voice data packet is legal or not, if so, executing S230; if not, go to S240.
Optionally, detecting whether the voice data packet is legal may include: detecting whether the voice data packet is under a target answering order number or not; detecting whether the voice data packet is in a set audio format, namely an mp3 format; detecting whether the data in the voice data packet is complete, and the like. The purpose of detecting whether the voice data packet is legal is to ensure that the acquired voice data packet can be correctly loaded and completely played, avoid acquiring wrong data and improve the safety and reliability of the data acquisition process.
And S230, loading the voice data packet.
Optionally, if it is detected that the voice data packet in the obtained answering file is legal, the voice data packet is normally loaded according to the corresponding audio format.
And S240, displaying that the loading fails.
Optionally, if it is detected that the voice data packet in the obtained answering file is illegal, an error prompt message indicating that loading fails is displayed on the playing terminal to notify the user that the voice data loading fails.
And S250, adaptively adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the resolution of the playing terminal.
And S260, drawing and displaying the handwriting according to the handwriting data packet and the display resolution of the handwriting while performing voice playing on the voice data packet.
According to the technical scheme of the embodiment, the validity of the voice data packet in the answering file is detected, and the voice data packet is loaded only when the voice data packet is legal, so that the effects of improving the safety and reliability of data acquisition are achieved.
EXAMPLE III
Fig. 3 is a flowchart illustrating a method for playing an online answering content according to a third embodiment of the present invention. The present embodiment is optimized based on the above embodiments, and provides a preferred method for playing online answering content, specifically, after loading the voice data packet, the method further includes: detecting whether the handwriting data packet is legal or not; if the handwriting data packet is determined to be legal, aligning the time of the handwriting data packet with the time of the voice data packet according to a relative time stamp in the handwriting data packet, wherein the relative time stamp is a time difference value of an acquisition time point of the handwriting data packet relative to an acquisition time point of the first voice data packet; and if the handwriting data packet is determined to be illegal, discarding the voice data packet and the handwriting data packet.
S310, obtaining a question answering file, wherein the question answering file comprises a voice data packet and a handwriting data packet.
S320, detecting whether the voice data packet is legal or not, if so, executing S230; if not, go to S240.
And S330, loading the voice data packet.
And S340, displaying the loading failure.
S350, detecting whether the handwriting data packet is legal or not, and if so, executing S360; if not, S370 is executed.
Optionally, detecting whether the handwriting data packet is legal may include: detecting whether the handwriting data packet is a handwriting data packet under a target answering order number; detecting whether the handwriting data packet is in a set handwriting format, namely pen format; and detecting whether the data in the handwriting data packet is complete or not. The purpose of detecting whether the handwriting data packet is legal is to ensure that the acquired handwriting data packet can be correctly loaded and completely played, avoid acquiring wrong data and improve the safety and reliability of the data acquisition process.
And S360, aligning the time of the handwriting data packet with the time of the voice data packet according to the relative time stamp in the handwriting data packet.
And the relative timestamp is a time difference value of the acquisition time point of the handwriting data packet relative to the acquisition time point of the first voice data packet.
Illustratively, when it is detected that the handwriting data packet in the obtained answering file is also legal, the voice data packet and the handwriting data packet need to be played and displayed according to a time axis, specifically, the handwriting data packet and the voice data packet played at a time point corresponding to a relative timestamp in the handwriting data packet can be aligned according to the relative timestamp, so that handwriting can be synchronously drawn and displayed on the handwriting data packet while the voice data packet is played in subsequent steps.
And S370, discarding the voice data packet and the handwriting data packet.
Optionally, if it is detected that the obtained handwriting data packet in the answering file is illegal, an error prompt message indicating that loading fails is displayed on the playing terminal, and the obtained voice data packet and the obtained handwriting data packet are discarded, so as to save the storage space of the playing terminal.
And S380, adaptively adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the resolution of the playing terminal.
And S390, drawing and displaying the handwriting according to the handwriting data packet and the display resolution of the handwriting while performing voice playing on the voice data packet.
According to the technical scheme, the legality of the handwriting data packet in the answering file is detected, the handwriting data packet is aligned with the time of the voice data packet according to the relative timestamp in the handwriting data packet when the legality of the handwriting data packet is determined, otherwise, the voice data packet and the handwriting data packet are discarded, the data acquisition safety is improved, the synchronous data playing is guaranteed, and the storage space is saved.
Example four
Fig. 4 is a flowchart illustrating a method for playing an online answering content according to a fourth embodiment of the present invention. The present embodiment is optimized based on the foregoing embodiments, and provides a preferred method for playing online answering content, specifically, the method further optimizes adaptively adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the resolution of the playing terminal, including: acquiring the equipment pixel ratio of a playing terminal; and adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the equipment pixel ratio and the set scaling factor.
S410, obtaining an answering file, wherein the answering file comprises a voice data packet and a handwriting data packet.
And S420, acquiring the device pixel ratio of the playing terminal.
The device pixel ratio can be obtained by reading a system parameter of the play terminal, for example, reading a value of window. The purpose of obtaining the device pixel ratio of the playing terminal is to provide a reference basis for subsequently adjusting the display resolution of the handwriting corresponding to the handwriting data packet, so that the display resolution can be automatically adjusted when online answering contents are played on different devices, and the stability of the playing effect is improved.
And S430, adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the equipment pixel ratio and the set scaling factor.
Since the display resolution of the handwriting corresponding to the handwriting data packet may be affected when the playing terminal zooms in or out the display resolution of the handwriting corresponding to the handwriting data packet, the display resolution of the handwriting corresponding to the note data packet needs to be adjusted by scaling the coordinates of each pixel point in an equal proportion.
Preferably, the display resolution of the handwriting corresponding to the handwriting data packet may be adjusted according to the formula f (x, y) ═ e (x, y) × r (x, y) × scale; wherein f (x, y) is the coordinate of each pixel point under the display resolution of the adjusted handwriting information, e (x, y) is the coordinate of each pixel point under the display resolution of the handwriting information before adjustment, r (x, y) is a set scaling factor, and scale is the device pixel ratio of the playing terminal.
The method comprises the steps of obtaining handwriting size of a client, and setting a scaling factor as a scaling multiple value of the handwriting size collected and displayed on the client in an online question answering process relative to the handwriting size in an actual writing process.
And S440, drawing and displaying the handwriting according to the handwriting data packet and the display resolution of the handwriting while performing voice playing on the voice data packet.
According to the technical scheme, the display resolution ratio of the handwriting corresponding to the handwriting data packet is adjusted according to the device pixel ratio and the set zoom factor by obtaining the device pixel ratio of the playing terminal, so that the display resolution ratio is automatically adjusted when online answering contents are played on different devices, and the stability of the playing effect is improved.
EXAMPLE five
Fig. 5 is a flowchart illustrating a method for playing an online answering content according to a fifth embodiment of the present invention. The present embodiment is optimized based on the above embodiments, and provides a preferable method for playing online answering content, specifically, further optimizing drawing and displaying of handwriting according to a handwriting data packet and a display resolution of the handwriting, including: dynamically creating and displaying a target page according to a page number corresponding to current handwriting data in the handwriting data packet; and drawing and displaying the handwriting corresponding to the preset amount of handwriting data on the target page according to the display resolution of the handwriting.
S510, obtaining an answering file, wherein the answering file comprises a voice data packet and a handwriting data packet.
S520, the display resolution of the handwriting corresponding to the handwriting data packet is adaptively adjusted according to the resolution of the playing terminal.
S530, when the voice data packet is played in a voice mode, a target page is dynamically created and displayed according to the page number corresponding to the current handwriting data in the handwriting data packet.
Preferably, the handwriting data packet adopts a jsonp format, and the format supports compatible playing of rendered handwriting data at a computer end, a webpage end and a mobile phone application end, so that the problem of cross-domain of the browser is solved, and the handwriting data packet can be directly internally analyzed into the jsonp data after being read by the browser. Preferably, the jsonnp format of the handwriting data packet may be specifically defined as: the handwriting data comprises a handwriting data head and a handwriting data body, wherein the handwriting data body comprises a variable s which represents the page number of the page where the handwriting is located, and the page number corresponding to the current handwriting data is the value of the variable s in the currently read handwriting data packet.
Illustratively, a page can be created for each page of the handwriting for displaying all the handwriting under the page number corresponding to the current handwriting data, wherein one page number is mapped to one page, when the display is performed at the play terminal, only one page is displayed each time, that is, only the target page of the page number corresponding to the current handwriting data is displayed, and the pages of other page numbers are hidden. And if the page number corresponding to the next handwriting data to be displayed is different from the page number corresponding to the currently displayed handwriting data, newly creating a page, mapping and associating the page number with the page number, and switching the displayed page to the newly created page when the next handwriting data needs to be displayed.
And S540, drawing and displaying the handwriting corresponding to the preset amount of handwriting data on the target page according to the display resolution of the handwriting.
In consideration of the comfortable degree of the human eyes on the handwriting drawing speed, and in order to give consideration to the handwriting drawing efficiency, preferably, the preset number can be set to 30, that is, each 30 pieces of handwriting data are drawn once, so that the feeling of unsmooth or jumping drawing for the human eyes in the handwriting drawing process is not caused, and meanwhile, the pressure on the memory resource of the playing terminal is not caused. Illustratively, according to the display resolution of the adjusted handwriting, handwriting corresponding to 30 pieces of handwriting data is drawn and displayed on the currently displayed target page each time, and a picture displayed by the mobile phone playing terminal is as shown in fig. 8.
According to the technical scheme, when voice playing is conducted on the voice data packet, the target page is dynamically created and displayed according to the page number corresponding to the current handwriting data in the handwriting data packet, and handwriting corresponding to the handwriting data with the preset number is drawn and displayed on the target page according to the display resolution of the handwriting, so that the drawing and displaying of the handwriting meet the human eye vision habit, pressure cannot be caused to memory resources of the playing terminal, and playing experience is improved.
EXAMPLE six
Fig. 6 is a flowchart illustrating a method for playing an online answering content according to a sixth embodiment of the present invention. The present embodiment is optimized based on the above embodiments, and provides a preferable method for playing online answering content, specifically, after performing drawing and displaying of handwriting according to a handwriting data packet and a display resolution of the handwriting, the method further includes: when a forward adjustment instruction of the playing progress bar is acquired, adjusting the current playing progress to a front target position forward according to the forward adjustment instruction; if the page number corresponding to the page displayed at the front target position is the same as the page number corresponding to the page displayed before adjustment, clearing all handwriting in the page number, and drawing and displaying handwriting corresponding to all handwriting data between the initial position and the front target position under the page number; and if the page number corresponding to the page displayed at the front target position is different from the page number corresponding to the page displayed before adjustment, clearing all handwriting in the page number corresponding to the page displayed before adjustment, and drawing and displaying handwriting corresponding to all handwriting data between the initial position and the front target position of the page number corresponding to the page displayed at the front target position.
S610, obtaining an answering file, wherein the answering file comprises a voice data packet and a handwriting data packet.
S620, the display resolution of the handwriting corresponding to the handwriting data packet is adaptively adjusted according to the resolution of the playing terminal.
And S630, drawing and displaying the handwriting according to the handwriting data packet and the display resolution of the handwriting while performing voice playing on the voice data packet.
And S640, when the forward adjustment instruction of the playing progress bar is acquired, adjusting the current playing progress forward to a forward target position according to the forward adjustment instruction.
Illustratively, when a user slides the play progress bar forward, the play terminal obtains a forward adjustment instruction of the play progress bar, at this time, the current play progress is adjusted forward to a forward target position specified by the user according to the forward adjustment instruction, obtains a voice data packet corresponding to a moment at the position, and continues to play with a timestamp corresponding to voice data in the voice data packet as the current play progress.
S650, judging whether the page number corresponding to the page displayed at the front target position is the same as the page number corresponding to the page displayed before adjustment or not, if so, executing S660; if not, go to S670.
Illustratively, the page number corresponding to the handwriting data in the handwriting data packet acquired at the front target position is the page number corresponding to the page displayed at the position, and the page number corresponding to the handwriting data in the handwriting data packet acquired last before adjustment is the page number corresponding to the page displayed before adjustment.
And S660, clearing all handwriting in the page number, and drawing and displaying the handwriting corresponding to all handwriting data from the initial position to the front target position under the page number.
Illustratively, when more than ten thousand handwriting data are drawn at one time, a large amount of memory resources are occupied in a short time, and the occupancy rate of the central processing unit reaches a peak value instantly, so that the application software on the playing terminal exits accidentally.
And S670, clearing all handwriting in the page number corresponding to the page displayed before adjustment, and drawing and displaying the handwriting corresponding to all handwriting data between the initial position and the front target position under the page number corresponding to the page displayed at the front target position.
Illustratively, if the page displayed at the front target position is not the currently displayed page, all handwriting in the currently displayed page can be directly cleared, only handwriting corresponding to all handwriting data between the starting position under the page number corresponding to the page displayed at the front target position and the front target position is drawn and displayed, and meanwhile, the page displayed at the front target position is set to be in a display state.
According to the technical scheme of the embodiment, the handwriting corresponding to the drawn and displayed handwriting data is determined by judging whether the page number corresponding to the page displayed at the front target position is the same as the page number corresponding to the page displayed before adjustment, so that the reliability and the stability of the playing effect are improved.
Optionally, as an alternative step from S640 to S670, when a backward adjustment instruction of the play progress bar is obtained, the current play progress is adjusted backward to a rear target position according to the backward adjustment instruction; if the page number corresponding to the page displayed at the rear target position is the same as the page number corresponding to the page displayed before adjustment, drawing and displaying handwriting corresponding to all handwriting data between the playing position before adjustment and the rear target position; and if the page number corresponding to the page displayed at the rear target position is different from the page number corresponding to the page displayed before adjustment, clearing all handwriting in the page number corresponding to the page displayed before adjustment, and drawing and displaying handwriting corresponding to all handwriting data between the initial position and the rear target position of the page corresponding to the page displayed at the rear target position.
EXAMPLE seven
Fig. 7 is a schematic structural diagram of a playing apparatus for online answering content according to a seventh embodiment of the present invention. Referring to fig. 7, the playing apparatus for on-line answering content includes: a file obtaining module 710, a resolution adjusting module 720 and a playing and displaying module 730, which are described in detail below.
A file obtaining module 710, configured to obtain an answering file, where the answering file includes a voice data packet and a handwriting data packet;
the resolution adjusting module 720 is configured to adaptively adjust the display resolution of the handwriting corresponding to the handwriting data packet according to the resolution of the play terminal;
and the playing and displaying module 730 is configured to, while performing voice playing on the voice data packet, perform drawing and displaying of the handwriting according to the handwriting data packet and the display resolution of the handwriting.
The playing device for the online answering content provided by the embodiment adaptively adjusts the display resolution of the handwriting corresponding to the handwriting data packet in the answering file by acquiring the answering file and according to the resolution of the terminal, performs drawing and displaying of the handwriting according to the display resolution of the handwriting data packet and the handwriting while performing voice playing, utilizes the advantage of adaptively adjusting the display resolution of the handwriting, solves the problem of unstable playing effect caused by inconsistent display resolution of different devices in the prior art, realizes automatic adjustment of the display resolution when the online answering content is played on different devices, and improves the stability of the playing effect.
Optionally, the method may further include:
the first detection module is used for detecting whether the voice data packet is legal or not after the answering file is obtained;
and the voice loading module is used for loading the voice data packet if the voice data packet is determined to be legal.
Optionally, the method may further include:
the second detection module is used for detecting whether the handwriting data packet is legal or not after the voice data packet is loaded;
the time alignment module is used for aligning the time of the handwriting data packet with the time of the voice data packet according to a relative time stamp in the handwriting data packet if the handwriting data packet is determined to be legal, wherein the relative time stamp is a time difference value of an acquisition time point of the handwriting data packet relative to an acquisition time point of a first voice data packet;
and the data discarding module is used for discarding the voice data packet and the handwriting data packet if the handwriting data packet is determined to be illegal.
Optionally, the resolution adjustment module 720 may include:
the pixel ratio obtaining submodule is used for obtaining the equipment pixel ratio of the playing terminal;
and the resolution determination submodule is used for adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the equipment pixel ratio and the set scaling factor.
Optionally, the resolution determination sub-module may be specifically configured to:
according to the formula: adjusting the display resolution of the handwriting corresponding to the handwriting data packet, wherein f (x, y) is e (x, y) x r (x, y) x scale;
wherein f (x, y) is the coordinate of each pixel point under the display resolution of the adjusted handwriting information, e (x, y) is the coordinate of each pixel point under the display resolution of the handwriting information before adjustment, r (x, y) is a set zoom factor, and scale is the device pixel ratio of the playing terminal.
Optionally, the playing and displaying module 730 may be specifically configured to:
dynamically creating and displaying a target page according to a page number corresponding to the current handwriting data in the handwriting data packet;
and drawing and displaying the handwriting corresponding to the preset amount of handwriting data on the target page according to the display resolution of the handwriting.
Optionally, the method may further include:
the progress forward adjusting module is used for drawing and displaying the handwriting according to the handwriting data packet and the display resolution of the handwriting, and adjusting the current playing progress forward to a front target position according to the forward adjusting instruction when the forward adjusting instruction of the playing progress bar is obtained;
the first forward drawing module is used for clearing all handwriting in the page number and drawing and displaying handwriting corresponding to all handwriting data between the initial position under the page number and the front target position if the page number corresponding to the page displayed at the front target position is the same as the page number corresponding to the page displayed before adjustment;
and the second forward drawing module is used for clearing all handwriting in the page number corresponding to the page displayed before adjustment if the page number corresponding to the page displayed at the front target position is different from the page number corresponding to the page displayed before adjustment, and drawing and displaying the handwriting corresponding to all handwriting data between the starting position and the front target position under the page number corresponding to the page displayed at the front target position.
Optionally, the method may further include:
the progress backward adjustment module is used for adjusting the current playing progress backward to a rear target position according to the backward adjustment instruction when a backward adjustment instruction of the playing progress bar is obtained after the handwriting is drawn and displayed according to the handwriting data packet and the display resolution of the handwriting;
the first backward drawing module is used for drawing and displaying handwriting corresponding to all handwriting data between the playing position before adjustment and the rear target position if the page number corresponding to the page displayed at the rear target position is the same as the page number corresponding to the page displayed before adjustment;
and the second backward drawing module is used for clearing all handwriting in the page number corresponding to the page displayed before the adjustment if the page number corresponding to the page displayed at the rear target position is different from the page number corresponding to the page displayed before the adjustment, and drawing and displaying the handwriting corresponding to all handwriting data between the starting position below the page number corresponding to the page displayed at the rear target position and the rear target position.
The product can execute the method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (9)

1. A method for playing an on-line answering content, comprising:
acquiring an answering file, wherein the answering file comprises a voice data packet and a handwriting data packet;
adaptively adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the resolution of the playing terminal;
drawing and displaying handwriting according to the handwriting data packet and the display resolution of the handwriting while performing voice playing on the voice data packet;
the drawing and displaying of the handwriting according to the handwriting data packet and the display resolution of the handwriting comprises the following steps:
dynamically creating and displaying a target page according to a page number corresponding to the current handwriting data in the handwriting data packet;
drawing the handwriting corresponding to the handwriting data of every preset amount once on the target page according to the display resolution of the handwriting; the preset number is greater than 1.
2. The method of claim 1, wherein after obtaining the answering document, further comprising:
detecting whether the voice data packet is legal or not;
and if the voice data packet is determined to be legal, loading the voice data packet.
3. The method of claim 2, further comprising, after loading the voice data packet:
detecting whether the handwriting data packet is legal or not;
if the handwriting data packet is determined to be legal, aligning the time of the handwriting data packet with the time of the voice data packet according to a relative time stamp in the handwriting data packet, wherein the relative time stamp is a time difference value of an acquisition time point of the handwriting data packet relative to an acquisition time point of a first voice data packet;
and if the handwriting data packet is determined to be illegal, discarding the voice data packet and the handwriting data packet.
4. The method according to claim 1, wherein the adaptively adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the resolution of the playing terminal comprises:
acquiring the equipment pixel ratio of the playing terminal;
and adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the equipment pixel ratio and the set scaling factor.
5. The method as claimed in claim 4, wherein the adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the device pixel ratio and the set scaling factor comprises:
according to the formula: adjusting the display resolution of the handwriting corresponding to the handwriting data packet, wherein f (x, y) is e (x, y) x r (x, y) x scale;
wherein f (x, y) is the coordinate of each pixel point under the display resolution of the adjusted handwriting information, e (x, y) is the coordinate of each pixel point under the display resolution of the handwriting information before adjustment, r (x, y) is a set zoom factor, and scale is the device pixel ratio of the playing terminal.
6. The method of claim 1, after rendering and displaying the handwriting according to the handwriting data package and the display resolution of the handwriting, further comprising:
when a forward adjustment instruction of the playing progress bar is acquired, adjusting the current playing progress to a front target position forward according to the forward adjustment instruction;
if the page number corresponding to the page displayed at the front target position is the same as the page number corresponding to the page displayed before adjustment, clearing all handwriting in the page number, and drawing and displaying handwriting corresponding to all handwriting data between the initial position under the page number and the front target position;
if the page number corresponding to the page displayed at the front target position is different from the page number corresponding to the page displayed before adjustment, clearing all handwriting in the page number corresponding to the page displayed before adjustment, and drawing and displaying the handwriting corresponding to all handwriting data between the initial position and the front target position under the page number corresponding to the page displayed at the front target position.
7. The method of claim 1, after rendering and displaying the handwriting according to the handwriting data package and the display resolution of the handwriting, further comprising:
when a backward adjustment instruction of the playing progress bar is acquired, adjusting the current playing progress backward to a rear target position according to the backward adjustment instruction;
if the page number corresponding to the page displayed at the rear target position is the same as the page number corresponding to the page displayed before adjustment, drawing and displaying handwriting corresponding to all handwriting data between the playing position before adjustment and the rear target position;
and if the page number corresponding to the page displayed at the rear target position is different from the page number corresponding to the page displayed before adjustment, clearing all handwriting in the page number corresponding to the page displayed before adjustment, and drawing and displaying handwriting corresponding to all handwriting data between the lower initial position of the page number corresponding to the page displayed at the rear target position and the rear target position.
8. A playback apparatus for playing back an on-line answering content, comprising:
the device comprises a file acquisition module, a file storage module and a file sending module, wherein the file acquisition module is used for acquiring an answering file, and the answering file comprises a voice data packet and a handwriting data packet;
the resolution adjusting module is used for adaptively adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the resolution of the playing terminal;
the playing and displaying module is used for drawing and displaying the handwriting according to the handwriting data packet and the display resolution of the handwriting while playing the voice of the voice data packet;
the playing and displaying module may be specifically configured to: dynamically creating and displaying a target page according to a page number corresponding to the current handwriting data in the handwriting data packet; drawing the handwriting corresponding to the handwriting data of every preset amount once on the target page according to the display resolution of the handwriting; the preset number is greater than 1.
9. The apparatus of claim 8, wherein the resolution adjustment module comprises:
the pixel ratio obtaining submodule is used for obtaining the equipment pixel ratio of the playing terminal;
and the resolution determination submodule is used for adjusting the display resolution of the handwriting corresponding to the handwriting data packet according to the equipment pixel ratio and the set scaling factor.
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