CN106534964B - Method and device for adjusting speech rate - Google Patents
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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
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44204—Monitoring of content usage, e.g. the number of times a movie has been viewed, copied or the amount which has been watched
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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
- H04N21/439—Processing of audio elementary streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—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
- H04N21/47217—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 controlling playback functions for recorded or on-demand content, e.g. using progress bars, mode or play-point indicators or bookmarks
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Abstract
The embodiment of the invention discloses a speech rate adjusting method and device. The method comprises the following steps: in the video playing process, detecting whether a currently played video frame is provided with voice information; and if the voice information is matched, playing the current video frame according to the preset playing speed. The embodiment of the invention solves the problem that in the prior art, when the speech explaining speed in the video is not matched with the receiving speed of the user, the speech speed is adjusted and the playing speed of the video frame without the speech information is adjusted at the same time, thereby achieving the effect of adjusting the speech speed in a humanized way.
Description
Technical Field
The embodiment of the invention relates to a voice recognition technology, in particular to a method and a device for adjusting a speech speed.
Background
With the rapid development of network technology, a user can obtain a large amount of teaching video data, such as a course teaching video, a cooking skill teaching video, or a motion teaching video (e.g., a yoga course video), and learn related knowledge according to the video data.
Since the speeches of the speakers in the instructional video material are too fast or too slow for the user, the user cannot adapt to the speech rate of the speakers. At present, after starting the video player, the user can adjust the speed of the video playing according to a certain coefficient according to the speed of the speaker (for example, play according to the playing speed 1.25 times or 0.75 times of the playing speed) to adapt to the receiving rhythm of the user.
However, by adjusting the playing speed of the video player, not only the speech speed of the speech explanation part of the interpreter is adjusted, but also the video playing speed of the part without speech explanation in the teaching video is adjusted, so that the video playing speed of the part without speech explanation is changed, for example, too fast or too slow experiment phenomena or action exhibition is exhibited, and the played experiment phenomena or actions are inconsistent with the actual on-site experiment phenomena or actions, and the learning effect of the user is poor.
Disclosure of Invention
The invention provides a speech rate adjusting method and a speech rate adjusting device, which aim to realize humanized adjustment of video playing speed.
In a first aspect, an embodiment of the present invention provides a speech rate adjustment method, where the method includes:
in the video playing process, whether the currently played video frame is provided with voice information or not is detected.
And if the voice information is matched, playing the current video frame according to the preset playing speed.
Further, the method further comprises:
and if the voice information is not matched, playing the current video frame according to the standard playing speed.
Further, in the video playing process, detecting whether the currently played video frame is provided with the voice information includes:
in the video playing process, detecting whether a corresponding audio track is accessed to a currently played video frame;
if the corresponding audio track is accessed, determining that the currently played video frame is provided with voice information;
and if no corresponding audio track is accessed, determining that the currently played video frame is not provided with the voice information.
Further, playing the current video frame according to the preset playing speed includes:
determining a voice playing time starting point and a voice playing time stopping point contained in the audio track;
and playing the video frames from the starting point to the stopping point according to a preset playing speed.
Further, the method further comprises:
editing the video, and determining a video frame with voice information in the video;
and setting the starting point and the ending point of the video frame provided with the voice information to correspond to the starting point and the ending point of the audio track.
In a second aspect, an embodiment of the present invention further provides a speech rate adjusting apparatus, where the apparatus includes:
and the voice detection module is used for detecting whether the currently played video frame is provided with voice information or not in the video playing process.
And the playing module is used for playing the current video frame according to the preset playing speed if the fact that the current playing video frame is matched with the voice information is detected.
Further, the playing module is further configured to:
and if the current playing video frame is detected not to be provided with the voice information, playing the current video frame according to the standard playing speed.
Further, the voice detection module is specifically configured to:
in the video playing process, detecting whether a corresponding audio track is accessed to a currently played video frame;
if the corresponding audio track is accessed, determining that the currently played video frame is provided with voice information; and if no corresponding audio track is accessed, determining that the currently played video frame is not provided with the voice information.
Further, the playing module is specifically configured to:
determining a voice playing time starting point and a voice playing time stopping point contained in the audio track;
and playing the video frames from the starting point to the stopping point according to a preset playing speed.
Further, the apparatus further comprises:
the preprocessing module is used for editing the video and determining a video frame which is provided with voice information in the video;
and setting the starting point and the ending point of the video frame provided with the voice information to correspond to the starting point and the ending point of the audio track.
The embodiment of the invention solves the problem that the playing speed of the video frame without the voice information is adjusted at the same time when the voice explaining speed in the video is not matched with the receiving speed of the user in the prior art by adjusting the playing speed of the video frame with the voice information, thereby achieving the effect of adjusting the voice speed in a humanized way.
Drawings
FIG. 1 is a flowchart illustrating a speech rate adjustment method according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a speech rate adjustment method according to a second embodiment of the present invention;
FIG. 3 is a flowchart illustrating a speech rate adjustment method according to a third embodiment of the present invention;
FIG. 4 is a flowchart illustrating a speech rate adjustment method according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of a speech rate adjusting device 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 of a speech rate adjusting method according to an embodiment of the present invention, where this embodiment is applicable to a situation of personalized speech rate adjustment during a teaching video playing process, and the method can be executed by a speech rate adjusting device according to an embodiment of the present invention, where the device can be implemented in a software and/or hardware manner, and the device can be integrated in a terminal with a video playing function, and the method specifically includes:
s110, in the video playing process, whether the currently played video frame is provided with voice information or not is detected.
When the continuous image changes by more than 24 frames per second, human eyes cannot distinguish a single static image according to the persistence of vision principle to form a smooth continuous video effect, wherein the unit of the static image is a frame. The voice information refers to voice information contained in a currently played video, and for example, if the currently played video is a physical experiment instruction course, the voice information refers to voice information for a teacher to explain an experiment.
In this embodiment, during video playing, each playing unit of a currently played video is detected, and one playing unit includes at least one video frame, and it is determined whether the video frame is provided with voice information of a current video interpreter.
And S120, if the voice information is matched, playing the current video frame according to the preset playing speed.
In this embodiment, when the teaching video is played, due to the difference in the speed of speech of the video interpreter or the difference in the speed of understanding by the user, the user may not follow the rhythm of the interpreter, or the user may think that the speed of the interpreter is too low and waste time, and the user may set the playing speed to play the current video frame by user-defined.
The preset playing speed refers to a video frame playing speed set by a user in a self-defined manner. When the user judges that the speech speed rhythm of the interpreter in the video is not matched with the receiving rhythm of the user, the playing speed of the video frame in the video can be set in a user-defined mode, and the video playing rhythm is suitable for the receiving rhythm of the user. Changing the playing speed of the video frame means that only the playing speed of the video frame is changed, and the tone or tone of the voice information in the video frame is not changed, so that the voice information and the picture in the video frame are not distorted.
Illustratively, the currently played video is a physical experiment instruction course, and if the user judges that the speed of the teacher for explanation is too slow after watching a video, the user can set the voice speed of the video to play at a speed 1.25 times of the standard voice speed according to the self condition. The video with the changed playing speed is a video frame provided with the teacher explaining the voice information.
According to the technical scheme, the problem that in the prior art, when the speed of speech explanation in a video is not matched with the receiving speed of a user, the speed of speech is adjusted while the speed of speech is adjusted by adjusting the playing speed of the video frame without the speech information is solved, and the effect of humanized adjustment of the speed of speech is achieved.
Example two
Fig. 2 is a flowchart of a speech rate adjustment method according to a second embodiment of the present invention, and based on the first embodiment, if the speech information is provided, playing the current video frame according to the preset playing speed is further optimized as follows: if the voice information is matched, playing the current video frame according to a preset playing speed; and if the voice information is not matched, playing the current video frame according to the standard playing speed. Correspondingly, the method specifically comprises the following steps:
s210, in the video playing process, whether the currently played video frame is provided with voice information or not is detected.
If the voice message is configured, step S220 is executed; if no voice message is provided, step S230 is executed.
And S220, playing the current video frame according to the preset playing speed.
And S230, playing the current video frame according to the standard playing speed.
Wherein, the standard playing speed refers to the original playing speed of the video frame which is not set by the user,
in this embodiment, in the teaching video, not only include the pronunciation explanation part, still include the show part, and is exemplary, and the show part can be experiment phenomenon observation part in the physics experiment explanation video, the sword worker teaching part in the kitchen art explanation video or yoga action guide part etc. in yoga teaching video. If the playing speed of the video frame of the display part in the video is adjusted, the played experimental phenomenon or action is inconsistent with the actual field experimental phenomenon or action, and the situation that the learning effect of the user is poor occurs.
Illustratively, the currently played video is a physical experiment instruction course, and the user sets, in combination with the self condition and the explanation speed in the video, that the video is played at a speed 1.25 times of the standard playing speed, so that when the video is played, the video frames containing the voice explanation are played at a speed 1.25 times of the standard playing speed, and the video frames not containing the voice explanation are automatically switched to the standard playing speed for playing.
According to the technical scheme of the embodiment, the playing speed of the video frame without the voice information is not changed by changing the playing speed of the video frame with the voice information, so that the problem that the playing speed of the video frame without the voice information is adjusted while the voice speed is adjusted in the prior art is solved, and the humanized effect of adjusting the voice speed is realized.
EXAMPLE III
Fig. 3 is a flowchart of a speech rate adjustment method according to a third embodiment of the present invention, where in this embodiment, based on the above embodiment, it is further optimized that whether a currently played video frame is matched with speech information is detected as follows: in the video playing process, detecting whether a corresponding audio track is accessed to a currently played video frame; if the corresponding audio track is accessed, determining that the currently played video frame is provided with voice information; and if no corresponding audio track is accessed, determining that the currently played video frame is not provided with the voice information. Correspondingly, the method specifically comprises the following steps:
s310, in the video playing process, whether the corresponding audio track is accessed to the currently played video frame is detected.
The tracks refer to parallel tracks of a strip displayed in sequencer software, and each track represents a voice message and contains information such as the tone, the volume or the number of channels of each voice message. The sound emitted by different sound sources corresponds to different audio tracks, and the currently played video frame comprises a plurality of audio tracks. In this embodiment, the corresponding audio track refers to an audio track for speech interpretation by an interpreter in a currently played video frame.
If the corresponding audio track is accessed, step S320 is executed; if no corresponding audio track is accessed, step S330 is executed.
And S320, if the currently played video frame is determined to be matched with the voice information, playing the current video frame according to the preset playing speed.
S330, if the video frame which is played currently is determined not to be provided with the voice information, the video frame is played currently according to the standard playing speed.
For example, the currently played video is a physical experiment tutor, and the audio track in the whole video can be an audio track including a teacher's voice explanation, an audio track of sounds generated by various device collisions during experiment operation, or an audio track of sounds in a phenomenon generated by a physical experiment. In the process of video playing, when a terminal detects that a sound track explained by a teacher voice is accessed, determining that a currently played video frame is provided with voice information, and playing the current video frame according to a playing speed preset by a user; correspondingly, when the terminal detects that the audio track without the teacher speech explanation is accessed, the currently played video frame is determined not to be provided with the speech information, and the currently played video frame is played according to the standard playing speed.
According to the technical scheme of the embodiment, whether the voice information is matched with the current video frame or not is determined by detecting whether the corresponding audio track is accessed into the current playing video frame or not, the playing speed of the current video frame is determined according to the judgment result of the voice information, and whether the voice information is matched with the current video frame or not is accurately judged, so that the problem that in the prior art, the playing speed of the video frame without the voice information is adjusted at the same time is solved, and the humanized effect of adjusting the voice speed is realized.
Example four
Fig. 4 is a flowchart of a speech rate adjusting method according to a fourth embodiment of the present invention, and based on the foregoing embodiment, the method further optimizes playing the current video frame according to the preset playing speed as follows: determining a voice playing time starting point and a voice playing time stopping point contained in the audio track; and playing the video frames from the starting point to the stopping point according to the preset playing speed. Correspondingly, the method specifically comprises the following steps:
s410, in the video playing process, whether the corresponding audio track is accessed to the currently played video frame is detected.
And S420, if the corresponding audio track is accessed, determining the starting point and the ending point of the voice playing time contained in the audio track. In the video played at the present time, the audio track of the speech explanation of the interpreter does not exist all the time in the playing process of the whole video, and has certain interval. In order to accurately detect whether there is audio track access in the current video frame, the time start point and the end point of the current audio track can be detected. Where the start point of a track refers to the start time point of the current track and the end point of the track refers to the end time point of the current track. Illustratively, the currently played video is a physical experiment instruction course, the teacher performs explanation when the video is played, the explanation time is 10 minutes, the time starting point of the audio track corresponding to the audio explanation of the teacher is 0:00 time of the video playing, and the time ending point of the audio track is 0:10 time of the video playing.
S430, playing the video frame from the starting point to the stopping point according to the preset playing speed.
In this embodiment, when the terminal detects that the currently played video frame includes the time starting point of the corresponding audio track, the playing speed of the video frame is adjusted to play at the preset playing speed set by the user, and the video frame is continuously played at the preset playing speed; and adjusting the playing speed of the video frame to be restored to the standard playing speed for playing until the terminal detects that the currently played video frame contains the time stop point of the corresponding audio track, and continuously playing at the standard playing speed until the terminal detects that the video frame contains the time start point of the corresponding audio track again, and circularly adjusting the playing speed of the video frame.
According to the technical scheme of the embodiment, the video frame part needing to adjust the speech rate is accurately judged by determining the time starting point and the stopping point of the corresponding audio track in the current video and adjusting the playing speed of the video frame between the starting point and the stopping point, so that the problem that the playing speed of the video frame without the speech information is adjusted while the speech rate is adjusted when the speech explaining speed in the video is not matched with the receiving speed of a user in the prior art is solved, and the effect of humanized adjustment of the speech rate is achieved.
Optionally, the speech rate adjusting method further includes:
editing the video, and determining a video frame with voice information in the video;
and setting the starting point and the ending point of the video frame provided with the voice information to correspond to the starting point and the ending point of the audio track.
The video editing process refers to the process of editing and processing the video by applying video editing software and the like on the influence of shooting by using video input equipment, wherein the video editing software can carry out nonlinear editing on a video source, cut or combine the video source and the like to generate new videos with different expressive power and different functions. In this embodiment, the purpose of the video editing process is to determine video frames in the video that are provided with speech information. For example, a video frame with speech information is divided from an original video, a time start point and a time end point of a track corresponding to the part of the video frame are determined, and a start point identifier and an end point identifier are respectively set at the time start point and the end point of the track, where the start point identifier and the end point identifier may be different identifiers.
EXAMPLE five
Fig. 5 is a schematic structural diagram of a speech rate adjusting apparatus according to a fifth embodiment of the present invention, where the apparatus is adapted to execute the speech rate adjusting method according to the fifth embodiment of the present invention, and the apparatus specifically includes:
the voice detection module 510 is configured to detect whether a currently played video frame is provided with voice information during a video playing process.
The playing module 520 is configured to play the current video frame according to a preset playing speed if it is detected that the current video frame is provided with the voice information.
Optionally, the playing module 520 is further configured to:
and if the current playing video frame is detected not to be provided with the voice information, playing the current video frame according to the standard playing speed.
Optionally, the voice detection module 510 is specifically configured to:
in the video playing process, detecting whether a corresponding audio track is accessed to a currently played video frame;
if the corresponding audio track is accessed, determining that the currently played video frame is provided with voice information; and if no corresponding audio track is accessed, determining that the currently played video frame is not provided with the voice information.
Optionally, the playing module 520 is specifically configured to:
determining a voice playing time starting point and a voice playing time stopping point contained in the audio track;
and playing the video frames from the starting point to the stopping point according to the preset playing speed.
Optionally, the apparatus further comprises:
the preprocessing module 530 is configured to edit a video and determine a video frame in the video, where the video frame is provided with voice information;
the start and end points of the video frames with the voice information are set corresponding to the start and end points of the audio track.
The speech rate adjusting device provided by the embodiment of the invention can execute the speech rate adjusting method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the executing 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 (2)
1. A speech rate adjustment method, comprising:
editing a teaching video, dividing a video frame with voice information from an original video, determining a time starting point and a time stopping point of an audio track corresponding to the divided video frame, and respectively setting a starting point identifier and a stopping point identifier at the time starting point and the stopping point of the audio track;
setting the start and stop points of the video frames with the voice information corresponding to the start and stop points of the audio track;
in the teaching video playing process, detecting whether a currently played video frame has audio track access of the speech explanation of the interpreter;
if the audio track of the voice explanation of the interpreter is accessed, determining that the currently played video frame is provided with voice information, determining the starting point and the stopping point of the voice playing time contained in the audio track, and playing the video frame between the starting point and the stopping point according to a preset playing speed;
and if no audio track of the speech explanation of the interpreter is accessed, determining that the currently played video frame is not provided with the speech information, and playing the current video frame according to the standard playing speed.
2. A speech rate adjusting apparatus, comprising:
the pre-processing module is used for editing the video, dividing a video frame with voice information from an original video, determining the time start and stop points of an audio track corresponding to the divided video frame, respectively setting a start point identifier and a stop point identifier at the time start point and the stop point of the audio track, and correspondingly setting the start point and the stop point of the video frame with the voice information to the start point and the stop point of the audio track;
the voice detection module is used for detecting whether the currently played video frame is provided with voice information or not in the video playing process;
the playing module is used for playing the current video frame according to a preset playing speed if the fact that the current playing video frame is matched with the voice information is detected;
the play module is further configured to: if the current playing video frame is detected not to be provided with the voice information, the current video frame is played according to the standard playing speed;
wherein, the voice detection module is specifically configured to:
in the video playing process, detecting whether a currently played video frame has audio track access of the speech explanation of an interpreter; if the audio track of the voice explanation of the interpreter is accessed, determining that the currently played video frame is provided with voice information; if no audio track of the speech explanation of the interpreter is accessed, determining that the currently played video frame is not provided with speech information;
wherein the playing module is specifically configured to:
determining a voice playing time starting point and a voice playing time stopping point contained in the audio track; and playing the video frames from the starting point to the stopping point according to a preset playing speed.
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| CN107071553B (en) * | 2017-06-05 | 2020-02-07 | 广东小天才科技有限公司 | Method, device and computer readable storage medium for modifying video and voice |
| CN110177298B (en) * | 2019-05-27 | 2021-03-26 | 湖南快乐阳光互动娱乐传媒有限公司 | Voice-based video speed doubling playing method and system |
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| CN104469487A (en) * | 2014-12-31 | 2015-03-25 | 合一网络技术(北京)有限公司 | Detection method and device for scene switching points |
| CN104811798A (en) * | 2015-04-17 | 2015-07-29 | 广东欧珀移动通信有限公司 | Method and device for regulating video playing speed |
| CN105869626A (en) * | 2016-05-31 | 2016-08-17 | 宇龙计算机通信科技(深圳)有限公司 | Automatic speech rate adjusting method and terminal |
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