CN105100794B - Audio-visual synchronization method of testing and device - Google Patents
Audio-visual synchronization method of testing and device Download PDFInfo
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- CN105100794B CN105100794B CN201410201613.1A CN201410201613A CN105100794B CN 105100794 B CN105100794 B CN 105100794B CN 201410201613 A CN201410201613 A CN 201410201613A CN 105100794 B CN105100794 B CN 105100794B
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Abstract
The present invention discloses a kind of audio-visual synchronization method of testing and device, when device under test is tested, introduce the auxiliary equipment of a subtest, gather audio-video signal caused by the auxiliary equipment playing standard audio-visual synchronization signal, simultaneously when Devices to test records the auxiliary equipment playing standard audio-visual synchronization signal, gather the audio-video signal of the Devices to test output, according to the audio-video signal of the auxiliary equipment of collection and the audio-video signal of Devices to test, the audio-visual synchronization value for obtaining Devices to test is calculated；With the beneficial effect for shortening intelligent playing audio/video sound intermediate frequency broadcasting and video playback time delay.
Description
Technical field
The present invention relates to intelligent sound video broadcasting field, more particularly to a kind of audio-visual synchronization method of testing and device.
Background technology
With the rapid development of image procossing and audio signal processing technique and constantly progressive, intelligent playing audio/video also by
Impart more abundant function.By taking intelligent TV set as an example, user can be by possessing the intelligence electricity of camera and microphone
Internet chat, video recording etc. are carried out depending on machine；Intelligent TV set needs Voice ＆ Video synchronously to broadcast in progress Internet chat and video recording etc.
In the application scenarios put, the synchronism played to the Voice ＆ Video of the intelligent TV set requires higher, if Voice ＆ Video is broadcast
Put can not synchronously or the two play time delay it is long, then certainly will influence whether the normal use of the intelligent TV set.
One test index of the Voice ＆ Video synchronization that the conventional intelligent playing audio/video of measurement is played is sound
Audio video synchronization parameter, if the audio-visual synchronization parameter setting is unreasonable, the time delay between Voice ＆ Video can be caused long；
For example the personage in video pictures has done the action for being over and speaking, and the voice that the personage correspondingly says in audio is not also timely
Play, this obviously have impact on the normal use of intelligent playing audio/video.Therefore, how to intelligent playing audio/video
Voice ＆ Video synchronizes a urgent problem to be solved of the debugging as intelligent playing audio/video industry.
The content of the invention
In view of the foregoing, it is necessary to a kind of audio-visual synchronization method of testing and device are provided, to solve intelligent audio frequency and video
The problem of playback equipment sound intermediate frequency plays and video playback time delay is long.
The embodiment of the invention discloses a kind of audio-visual synchronization method of testing, comprise the following steps：
Caused audio signal S11 and vision signal S12 when gathering auxiliary equipment playing standard audio-visual synchronization signal,
And according to the audio signal S11 and vision signal S12 of collection, obtain the audio-visual synchronization parameter value Δ of the auxiliary equipment
S1；
When Devices to test records the auxiliary equipment and plays the Standard Audiovisual synchronizing signal, collection is described to be measured to be set
The audio signal S21 and vision signal S22 of standby output, and according to the audio signal S21 and vision signal S22 of collection, obtain
Take the audio-visual synchronization parameter value Δ S2 of the Devices to test；
According to the audio-visual synchronization parameter value Δ S1 of acquisition and audio-visual synchronization parameter value Δ S2, calculate and obtain institute
State the audio-visual synchronization value Δ S of Devices to test；Wherein, the Δ S=Δs S2- Δs S1.
Preferably, it is described collection auxiliary equipment playing standard audio-visual synchronization signal when caused audio signal S11 and
Vision signal S12, and according to the audio signal S11 and vision signal S12 of collection, obtain the audio frequency and video of the auxiliary equipment
The step of synchronization parameter value Δ S1, includes：
, will using optical flame detector when the auxiliary equipment plays the Standard Audiovisual synchronizing signal of exterior terminal input
The vision signal of the auxiliary equipment output is sent to the first passage of oscillograph, gathers the vision signal S12；
While the vision signal S12 is gathered, the audio signal that is exported the auxiliary equipment using voltage probe
The second channel of the oscillograph is sent to, gathers the audio signal S11；
According to audio volume control corresponding to oscillograph audio signal S11 of display simultaneously on user interface
And video waveform corresponding to the vision signal S12, obtain the vision signal S12 and the audio signal in preset duration
S11 voltage time delayed difference value, obtain the audio-visual synchronization parameter value Δ S1 of the auxiliary equipment.
Preferably, it is described the vision signal that the auxiliary equipment exports is sent to oscillograph using optical flame detector first lead to
Road, the step of gathering the vision signal S12, include：
The optical signal of the video image collected is converted into electric signal and by after conversion using the optical flame detector
The electric signal is sent to the first passage of oscillograph as vision signal S11, the institute that will be obtained by the oscillograph after conversion
Vision signal S11 is stated to show.
Preferably, the audio-visual synchronization parameter value Δ S2 is the vision signal S22 and the audio in preset duration
Signal S21 voltage time delayed difference value.
Preferably, the auxiliary equipment is identical with the machine core board hardware of Devices to test.
A kind of audio-visual synchronization test device is also disclosed in the embodiment of the present invention, including signal acquisition module and synchronization value obtain
Module；
The signal acquisition module is used for：
Caused audio signal S11 and vision signal S12 when gathering auxiliary equipment playing standard audio-visual synchronization signal,
And according to the audio signal S11 and vision signal S12 of collection, obtain the audio-visual synchronization parameter value Δ of the auxiliary equipment
S1；
When Devices to test records the auxiliary equipment and plays the Standard Audiovisual synchronizing signal, collection is described to be measured to be set
The audio signal S21 and vision signal S22 of standby output, and according to the audio signal S21 and vision signal S22 of collection, obtain
Take the audio-visual synchronization parameter value Δ S2 of the Devices to test；
The synchronization value acquisition module is used for：
According to the audio-visual synchronization parameter value Δ S1 of acquisition and audio-visual synchronization parameter value Δ S2, calculate and obtain institute
State the audio-visual synchronization value Δ S of Devices to test；Wherein, the Δ S=Δs S2- Δs S1.
Preferably, the signal acquisition module is additionally operable to：
, will using optical flame detector when the auxiliary equipment plays the Standard Audiovisual synchronizing signal of exterior terminal input
The vision signal of the auxiliary equipment output is sent to the first passage of oscillograph, gathers the vision signal S12；
While the vision signal S12 is gathered, the audio signal that is exported the auxiliary equipment using voltage probe
The second channel of the oscillograph is sent to, gathers the audio signal S11；
According to audio volume control corresponding to oscillograph audio signal S11 of display simultaneously on user interface
And video waveform corresponding to the vision signal S12, obtain the vision signal S12 and the audio signal in preset duration
S11 voltage time delayed difference value, obtain the audio-visual synchronization parameter value Δ S1 of the auxiliary equipment.
Preferably, the signal acquisition module is additionally operable to：
The optical signal of the video image collected is converted into electric signal and by after conversion using the optical flame detector
The electric signal is sent to the first passage of oscillograph as vision signal S11, the institute that will be obtained by the oscillograph after conversion
Vision signal S11 is stated to show.
Preferably, the audio-visual synchronization parameter value Δ S2 is the vision signal S22 and the audio in preset duration
Signal S21 voltage time delayed difference value.
Preferably, the auxiliary equipment is identical with the machine core board hardware of Devices to test.
The embodiment of the present invention gather auxiliary equipment playing standard audio-visual synchronization signal when caused audio signal S11 and
Vision signal S12, and according to the audio signal S11 and vision signal S12 of collection, obtain the audio frequency and video of the auxiliary equipment
Synchronization parameter value Δ S1；When Devices to test records the auxiliary equipment and plays the Standard Audiovisual synchronizing signal, institute is gathered
The audio signal S21 and vision signal S22 of Devices to test output are stated, and is believed according to the audio signal S21 and video of collection
Number S22, obtain the audio-visual synchronization parameter value Δ S2 of the Devices to test；According to the audio-visual synchronization parameter value Δ of acquisition
S1 and audio-visual synchronization parameter value Δ S2, calculate the audio-visual synchronization value Δ S of the Devices to test；Wherein, the Δ S=Δs
S2-ΔS1；With the beneficial effect for shortening intelligent playing audio/video sound intermediate frequency broadcasting and video playback time delay, regarded for sound
The shortening effect of audio frequency and video time delay of the frequency playback equipment under voice call is especially notable.
Brief description of the drawings
Fig. 1 is the embodiment schematic flow sheet of audio-visual synchronization method of testing one of the present invention；
Fig. 2 is to implement the embodiment application scenarios schematic diagram of audio-visual synchronization method of testing one of the present invention；
Fig. 3 is the embodiment high-level schematic functional block diagram of audio-visual synchronization test device one of the present invention.
Realization, functional characteristics and the advantage of purpose of the embodiment of the present invention will be done furtherly referring to the drawings in conjunction with the embodiments
It is bright.
Embodiment
Technical scheme is further illustrated below in conjunction with Figure of description and specific embodiment.It should be appreciated that this
The specific embodiment of place description is not intended to limit the present invention only to explain the present invention.
Audio-visual synchronization method of testing of the present invention can be applied possesses the playing audio/video of camera any, this
Invention audio-visual synchronization test device can be deployed on any playing audio/video for possessing camera；Audio frequency and video of the present invention
In synchronous detecting method and device, the intelligent playing audio/video for possessing camera includes intelligent TV set and other intelligence
Playing audio/video, the present embodiment is without exhaustive one by one.Following realities of audio-visual synchronization method of testing of the present invention and device
Apply in example, be only described by taking intelligent TV set as an example, the execution of the intelligent audio and video display device about other particular types
Process is similar with the implementation procedure of intelligent TV set, and the embodiment of the present invention without repeating one by one.
The embodiments of the invention provide a kind of audio-visual synchronization method of testing；As shown in figure 1, audio-visual synchronization of the present invention is surveyed
Method for testing comprises the following steps：
Caused audio signal S11 and regarded when step S101, gathering auxiliary equipment playing standard audio-visual synchronization signal
Frequency signal S12, and according to the audio signal S11 and vision signal S12 of collection, the audio frequency and video for obtaining the auxiliary equipment are same
Walk parameter value Δ S1；
In the embodiment of the present invention, it is necessary to introduce when device under test such as television set to be measured carries out audio-visual synchronization test
The subtest television set of the television set to be measured for subtest, i.e., the auxiliary equipment described in the embodiment of the present invention is as aided in
Television set；In order to improve the accuracy to television set audio-visual synchronization to be measured test, in actual test, choose for aiding in surveying
The machine core board hardware of the peritelevision machine of examination is identical with the machine core board hardware of the television set to be measured, i.e. peritelevision machine and electricity to be measured
The machine core board of machine is regarded as the machine core board of same model.
In test, collection peritelevision machine sowing put during Standard Audiovisual synchronizing signal caused audio signal S11 and
Vision signal S12, gathered audio signal S11 and vision signal S12 are read, and obtain gathered audio signal respectively
The voltage time delayed difference value of S11 and vision signal S12 on same time shaft；For example choose in the preset duration t1 periods, audio
Voltage time delayed difference value corresponding to signal S11 and vision signal S12, you can obtain the audio-visual synchronization parameter value of the peritelevision machine
ΔS1.Wherein, the audio-visual synchronization parameter value Δ S1 for the peritelevision machine being calculated is vector value, i.e., the audio-visual synchronization is joined
Value, Δ S1 may be positive number, can also be able to be negative；When audio-visual synchronization parameter value Δ S1 is positive number, when representing t1
Carve, the video playback leading audio of the peritelevision machine plays；When audio-visual synchronization parameter value Δ S1 is negative, t1 is represented
Moment, the audio of the peritelevision machine play leads video and played.
In the present embodiment, the Standard Audiovisual synchronizing signal that peritelevision machine sowing is put is inputted to the auxiliary for exterior terminal
The Standard Audiovisual synchronizing signal of television set；Such as the operational order that exterior terminal is triggered based on user, the standard pronunciation is regarded
Vertical synchronizing signal is inputted to the peritelevision machine.
Step S102, when Devices to test records the auxiliary equipment and plays the Standard Audiovisual synchronizing signal, collection
The audio signal S21 and vision signal S22 of the Devices to test output, and according to the audio signal S21 and video of collection
Signal S22, obtain the audio-visual synchronization parameter value Δ S2 of the Devices to test；
Caused audio signal S11 and vision signal when gathering peritelevision machine sowing and putting Standard Audiovisual synchronizing signal
While S12, the audio signal S21 and vision signal S22 of television set output to be measured are gathered.Wherein, the television set to be measured of collection
Output above-mentioned audio signal S21 and vision signal S22 be：The peritelevision, which is recorded, in television set to be tested plays the mark
During quasi- audio-visual synchronization signal, the audio signal and vision signal of the television set output to be measured.According to the audio of collection
Signal S21 and vision signal S22, gathered audio signal S21 and vision signal S22 are read, and obtain gathered audio
The voltage time delayed difference value of signal S21 and vision signal S22 in preset duration, you can the audio frequency and video for obtaining the television set to be measured are same
Walk parameter value Δ S2.
In order to keep the audio-visual synchronization parameter value Δ S2 of television set to be tested and peritelevision machine audio-visual synchronization to join
Value, Δ S1 uniformity, also for the audio-visual synchronization parameter value Δ S2 of the television set to be tested calculated accuracy, meter
When calculating the audio-visual synchronization parameter value Δ S2 of television set to be tested, the audio frequency and video parameter value Δ S1 with calculating peritelevision machine is chosen
Identical preset duration.Chosen when calculating audio-visual synchronization parameter value Δ S2 same with calculating audio-visual synchronization parameter value Δ S1
The voltage time delayed difference value of audio signal S21 and vision signal S22 in preset duration.Therefore, the sound of television set to be measured is being calculated
During audio video synchronization parameter value Δ S2, voltages of the vision signal S22 in the preset duration t1 with audio signal S21 is obtained respectively
Time delayed difference value, obtain the audio-visual synchronization parameter value Δ S2 of the peritelevision machine.Wherein, the sound for the peritelevision machine being calculated
Audio video synchronization parameter value Δ S2 is also vector value, i.e. audio-visual synchronization parameter value Δ S2 may be positive number, can also be able to be negative
Number；When audio-visual synchronization parameter value Δ S2 is positive number, t1 moment, the video playback leading audio of the peritelevision machine are represented
Play；When audio-visual synchronization parameter value Δ S2 is negative, the t1 moment is represented, the audio of the peritelevision machine plays to be regarded in advance
Frequency plays.
In the present embodiment, the television set to be measured possesses the hardware construction needed for recording audio/video on hardware configuration, than
Such as, the television set to be measured possesses camera needed for collection image (such as recorded video), possesses collection audio signal (as recorded sound
The nextport hardware component NextPorts such as the microphone needed for frequently).
In specific test scene, when testing the audio-visual synchronization parameter value of the television set to be measured, in order to as far as possible
The influence and interference in external testing environment are reduced, the display screen that the peritelevision machine is faced to the television set to be measured is put
Put, and the distance of the peritelevision machine and the television set to be measured is arranged to the pre-determined distance needed for recording audio/video, should
Pre-determined distance can be understood as preferable positional distance during recording audio/video, such as 3 meters.
Step S103, according to the audio-visual synchronization parameter value Δ S1 of acquisition and audio-visual synchronization parameter value Δ S2, meter
Calculate and obtain the audio-visual synchronization value Δ S of the Devices to test；Wherein, the Δ S=Δs S2- Δs S1.
According to the audio-visual synchronization parameter value Δ S1 of the peritelevision machine of acquisition, and the sound of the television set to be measured obtained regards
Frequency synchronization parameter value Δ S2, calculate the audio-visual synchronization value Δ S of the television set to be measured；Wherein, the Δ S and Δ S1 and Δ S2
Relation meet mathematical expression：Δ S=Δ S2- Δs S1.Whether the audio-visual synchronization value Δ S for identifying the television set to be measured obtained is 0,
Or whether the audio-visual synchronization value Δ S levels off to 0 in default error range.It will be understood to those skilled in the art that
Due to the trueness error between television set hardware and each test equipment, it is difficult to accomplish the complete definitely same of television set audio-video signal
Step, therefore, the television set to be measured that the present embodiment allows to test out audio-visual synchronization value Δ S in the default error range
Level off to 0.Ideally, as Δ S1=Δ S2=0, the audio-visual synchronization performance of the television set to be measured is optimal.
When calculate obtain television set to be measured audio-visual synchronization value Δ S beyond the default error range and with 0 phase
Difference is very remote, then needs audio-visual synchronization parameter value Δ S1, Δ S2 and the Δ S obtained according to above-mentioned calculating, debug TV to be tested
Machine, if desired, then debug peritelevision machine simultaneously.
In a preferred embodiment, before the audio-visual synchronization parameter, Δ S of television set to be measured is tested, first to auxiliary
Television set and television set to be measured is helped to be debugged, such as, debug peritelevision machine and the normal audio frequency and video of television set to be measured are broadcast
Put.It is of course also possible to when testing the television set to be measured, in the lump to the peritelevision machine and the normal sound of television set to be measured
Video playback is debugged.
In addition, in the embodiment of the present invention, step S101 and step S102 execution sequence are not limited, i.e. step S101
It can simultaneously be performed with step S102, perform step S102 again after step S101 can also be performed, naturally it is also possible to first step
Step S102 is performed after S102 again.
The embodiment of the present invention gather auxiliary equipment playing standard audio-visual synchronization signal when caused audio signal S11 and
Vision signal S12, and according to the audio signal S11 and vision signal S12 of collection, obtain the audio frequency and video of the auxiliary equipment
Synchronization parameter value Δ S1；When Devices to test records the auxiliary equipment and plays the Standard Audiovisual synchronizing signal, institute is gathered
The audio signal S21 and vision signal S22 of Devices to test output are stated, and is believed according to the audio signal S21 and video of collection
Number S22, obtain the audio-visual synchronization parameter value Δ S2 of the Devices to test；According to the audio-visual synchronization parameter value Δ of acquisition
S1 and audio-visual synchronization parameter value Δ S2, calculate the audio-visual synchronization value Δ S of the Devices to test；Wherein, the Δ S=Δs
S2-ΔS1；With the beneficial effect for shortening the broadcasting of intelligent TV set sound intermediate frequency and video playback time delay, for television set in voice
The shortening effect of audio frequency and video time delay under call is especially notable.
Based on the description of embodiment described in Fig. 1, Fig. 2 is refer to, Fig. 2 is to implement audio-visual synchronization method of testing one of the present invention
Embodiment application scenarios schematic diagram；In the concrete application scene shown in Fig. 2, regarding for television set and peritelevision machine to be measured is gathered
During frequency signal, realize by light sensation probe, when gathering the audio signal of television set and peritelevision machine to be measured, visited by voltage
Head is realized；And by the audio signal of television set and the peritelevision machine to be measured of collection and vision signal by general purpose oscialloscope come
Show.
It is before starting to test the audio-visual synchronization parameter value Δ S of television set to be measured, it is necessary to required hard when being tested
Part is disposed.In the present embodiment, testing the hardware device needed for television set to be measured has optical flame detector and oscillograph.As shown in Fig. 2 respectively
Optical flame detector corresponding to being set on television set to be measured and peritelevision machine, and popped one's head in by the light sensation of optical flame detector by the to be measured of collection
The vision signal of television set and peritelevision machine is sent to oscillograph.Outside during in order to reduce television set recording audio/video to be measured as far as possible
The interference of boundary's environment, the display screen of television set face peritelevision machine to be measured is placed on apart from the position of 3 meters of peritelevision machine.
The operational order that exterior terminal is triggered based on tester, input Standard Audiovisual to peritelevision machine and synchronously believe
Number, the Standard Audiovisual synchronizing signal of input is put in peritelevision machine sowing.Now, the optical flame detector set on peritelevision machine is adopted
The optical signal exported during the Standard Audiovisual synchronizing signal is put in collection peritelevision machine sowing, and the bright dark light of the image of output is believed
The electric signal of level height number is converted to, and is that the vision signal S12 that embodiment described in Fig. 1 describes passes through by the electric signal of collection
Light sensation probe is exported to oscillograph A first passage, and the vision signal is shown on oscillograph A user interface
Video waveform corresponding to S12 is out checked for user.Meanwhile gather the peritelevision machine sowing using voltage probe and put the mark
The audio signal S11 exported during quasi- audio-visual synchronization signal, and the audio signal S11 of collection is exported by voltage probe
To oscillograph A second channel, and the vision signal S12 with collection on oscillograph A user interface is simultaneously displayed on
On same user interface, checked for tester.
Meanwhile while the Standard Audiovisual synchronizing signal is put in peritelevision machine sowing, television set to be measured utilizes shooting
The Standard Audiovisual synchronizing signal that head and microphone records peritelevision machine sowing are put；Similarly, it is arranged on television set to be measured
On optical flame detector gather the video image that the peritelevision machine sowing that television set to be measured is recorded by camera is put, and by the figure of collection
As bright dark optical signal is converted to electric signal i.e. Fig. 1 of level height, the vision signal S22 of the embodiment description passes through light sensation
Probe is exported to oscillograph B first passage, and S22 pairs of the vision signal is shown on oscillograph B user interface
The video waveform answered out is checked for user.Meanwhile the audio signal recorded using the voltage probe collection television set to be measured
S21, and the audio signal S21 of collection is exported to oscillograph B second channel by voltage probe, and in oscillograph B
User interface on be simultaneously displayed on the vision signal S22 of collection on same user interface, looked into for tester
See.
S12 pairs of audio volume control and vision signal corresponding to audio signal S11 based on the oscillograph A peritelevision machines shown
The video waveform answered, it can easily obtain audio signal S11 and vision signal corresponding to any instant in certain time period
S12 voltage time delayed difference value；The audio signal S11 of peritelevision machine such as in t1 durations in certain time period is chosen as needed
With vision signal S12 voltage time delayed difference value, you can draw the audio-visual synchronization parameter value Δ S1 of peritelevision machine.Same road
Corresponding to reason, audio volume control corresponding to the audio signal S21 based on the oscillograph B television sets to be measured shown and vision signal S22
Video waveform, the voltage that also can easily obtain corresponding audio signal S21 and vision signal S22 in certain time period prolong
Time difference value；As needed choose with peritelevision machine identical preset duration in such as in t1 durations the television set to be measured sound
Frequency signal S21 and vision signal S22 voltage time delayed difference value, you can draw the audio-visual synchronization parameter value Δ of television set to be measured
S2.According to the audio-visual synchronization parameter value Δ S1 of the peritelevision machine of acquisition and the audio-visual synchronization parameter value Δ of television set to be measured
S2, draw the audio-visual synchronization parameter value Δ S of television set to be measured.And then according to the audio-visual synchronization parameter, Δ S1 of acquisition,
Δ S2 and Δ S, the audio-visual synchronization parameter value Δ S of television set to be measured is debugged so that the sound of the television set to be measured
Audio video synchronization value Δ S levels off to 0 in default error range.Further, according to actual test environment and test request, in order to
The audio-visual synchronization performance of television set to be measured is reached optimum degree, Δ S1 and Δ S2 can be debugged, it is met Δ S1=Δs
S2=0.
The embodiment of the present invention is tested television set to be measured by optical flame detector and oscillograph and peritelevision machine so that
The audio-video signal of collection is more directly perceived, improves the efficiency and convenience of test.
The embodiment of the present invention additionally provides a kind of embodiment of audio-visual synchronization test device one；As shown in figure 3, sound of the present invention
Audio video synchronization test device includes：Signal acquisition module 01 and synchronization value acquisition module 02.
The signal acquisition module 01 is used for：
Caused audio signal S11 and vision signal S12 when gathering auxiliary equipment playing standard audio-visual synchronization signal,
And according to the audio signal S11 and vision signal S12 of collection, obtain the audio-visual synchronization parameter value Δ of the auxiliary equipment
S1；When Devices to test records the auxiliary equipment and plays the Standard Audiovisual synchronizing signal, it is defeated to gather the Devices to test
The audio signal S21 and vision signal S22 gone out, and according to the audio signal S21 and vision signal S22 of collection, obtain institute
State the audio-visual synchronization parameter value Δ S2 of Devices to test.
In the embodiment of the present invention, it is necessary to introduce when device under test such as television set to be measured carries out audio-visual synchronization test
The subtest television set of the television set to be measured for subtest, i.e., the auxiliary equipment described in the embodiment of the present invention is as aided in
Television set；In order to improve the accuracy to television set audio-visual synchronization to be measured test, in actual test, choose for aiding in surveying
The machine core board hardware of the peritelevision machine of examination is identical with the machine core board hardware of the television set to be measured, i.e. peritelevision machine and electricity to be measured
The machine core board of machine is regarded as the machine core board of same model.
In test, the collection peritelevision machine sowing of signal acquisition module 01 is put caused during Standard Audiovisual synchronizing signal
Audio signal S11 and vision signal S12, gathered audio signal S11 and vision signal S12 are read, and obtain adopted respectively
Voltage time delayed difference values of the audio signal S11 and vision signal S12 of collection on same time shaft；Such as when choosing preset duration t1
Between in section, voltage time delayed difference value corresponding to audio signal S11 and vision signal S12, you can the sound for obtaining the peritelevision machine regards
Frequency synchronization parameter value Δ S1.Wherein, the audio-visual synchronization parameter value Δ for the peritelevision machine that signal acquisition module 01 is calculated
S1 is vector value, i.e., audio-visual synchronization parameter value Δ S1 may be positive number, can also be able to be negative；When the audio-visual synchronization is joined
When value, Δ S1 is positive number, the t1 moment is represented, the video playback leading audio of the peritelevision machine plays；When the audio-visual synchronization
When parameter value Δ S1 is negative, the t1 moment is represented, the audio of the peritelevision machine plays leads video and played.
In the present embodiment, the Standard Audiovisual synchronizing signal that peritelevision machine sowing is put is inputted to the auxiliary for exterior terminal
The Standard Audiovisual synchronizing signal of television set；Such as the operational order that exterior terminal is triggered based on user, the standard pronunciation is regarded
Vertical synchronizing signal is inputted to the peritelevision machine.
Caused audio letter when Standard Audiovisual synchronizing signal is put in peritelevision machine sowing is gathered in signal acquisition module 01
While number S11 and vision signal S12, signal acquisition module 01 gathers the audio signal S21 and video of television set output to be measured
Signal S22.Wherein, above-mentioned the audio signal S21 and vision signal S22 for the television set to be measured output that signal acquisition module 01 gathers
For：When television set to be tested records the peritelevision broadcasting Standard Audiovisual synchronizing signal, the television set to be measured is defeated
The audio signal and vision signal gone out.According to the audio signal S21 and vision signal S22 of collection, signal acquisition module 01
Gathered audio signal S21 and vision signal S22 is read, and obtains gathered audio signal S21 and vision signal S22 exists
Voltage time delayed difference value in preset duration, you can obtain the audio-visual synchronization parameter value Δ S2 of the television set to be measured.
In order to keep the audio-visual synchronization parameter value Δ S2 of television set to be tested and peritelevision machine audio-visual synchronization to join
Value, Δ S1 uniformity, also for the audio-visual synchronization parameter value Δ S2 of the television set to be tested calculated accuracy, letter
When number acquisition module 01 calculates the audio-visual synchronization parameter value Δ S2 of television set to be tested, the sound with calculating peritelevision machine is chosen
Video parameter values Δ S1 identical preset durations.I.e. signal acquisition module 01 calculate audio-visual synchronization parameter value Δ S2 when choose with
Calculate the voltage delay inequality of the audio signal S21 and vision signal S22 in the same preset durations of audio-visual synchronization parameter value Δ S1
Value.Therefore, when calculating the audio-visual synchronization parameter value Δ S2 of television set to be measured, signal acquisition module 01 obtains video letter respectively
Number voltage time delayed difference values of the S22 in the preset duration t1 with audio signal S21, the audio frequency and video for obtaining the peritelevision machine are same
Walk parameter value Δ S2.Wherein, the audio-visual synchronization parameter value Δ S2 for the peritelevision machine that signal acquisition module 01 is calculated
For vector value, i.e. audio-visual synchronization parameter value Δ S2 may be positive number, can also be able to be negative；When the audio-visual synchronization parameter
When value Δ S2 is positive number, the t1 moment is represented, the video playback leading audio of the peritelevision machine plays；When the audio-visual synchronization is joined
When value, Δ S2 is negative, the t1 moment is represented, the audio of the peritelevision machine plays leads video and played.
In the present embodiment, the television set to be measured possesses the hardware construction needed for recording audio/video on hardware configuration, than
Such as, the television set to be measured possesses camera needed for collection image (such as recorded video), possesses collection audio signal (as recorded sound
The nextport hardware component NextPorts such as the microphone needed for frequently).
In specific test scene, when testing the audio-visual synchronization parameter value of the television set to be measured, in order to as far as possible
The influence and interference in external testing environment are reduced, the display screen that the peritelevision machine is faced to the television set to be measured is put
Put, and the distance of the peritelevision machine and the television set to be measured is arranged to the pre-determined distance needed for recording audio/video, should
Pre-determined distance can be understood as preferable positional distance during recording audio/video, such as 3 meters.
The synchronization value acquisition module 02 is used for：It is same according to the audio-visual synchronization parameter value Δ S1 and audio frequency and video of acquisition
Parameter value Δ S2 is walked, calculates and obtains the audio-visual synchronization value Δ S of the Devices to test；Wherein, the Δ S=Δs S2- Δs S1.
The audio-visual synchronization parameter value Δ S1 of the peritelevision machine obtained according to signal acquisition module 01, and what is obtained are treated
The audio-visual synchronization parameter value Δ S2 of television set is surveyed, synchronization value acquisition module 02 calculates the audio-visual synchronization of the television set to be measured
It is worth Δ S；Wherein, the Δ S and Δ S1 and Δ S2 relation meets mathematical expression：Δ S=Δ S2- Δs S1.Synchronization value acquisition module
Whether the audio-visual synchronization value Δ S of television set to be measured that 02 identification obtains is 0, or the audio-visual synchronization value Δ S whether
Level off to 0 in default error range.It will be understood to those skilled in the art that due between television set hardware and each test equipment
Trueness error, it is difficult to accomplish the complete absolute synchronization of television set audio-video signal, therefore, allow what is tested out in the present embodiment
The audio-visual synchronization value Δ S of television set to be measured levels off to 0 in the default error range.Ideally, when Δ S1=Δs
During S2=0, the audio-visual synchronization performance of the television set to be measured is optimal.
When synchronization value acquisition module 02 calculates the audio-visual synchronization value Δ S of the television set to be measured obtained beyond described default
Error range and differed greatly with 0, then need audio-visual synchronization parameter value Δ S1, Δ S2 and the Δ S obtained according to above-mentioned calculating,
Debug television set to be tested, if desired, then debug peritelevision machine simultaneously.
In a preferred embodiment, before the audio-visual synchronization parameter, Δ S of television set to be measured is tested, first to auxiliary
Television set and television set to be measured is helped to be debugged, such as, debug peritelevision machine and the normal audio frequency and video of television set to be measured are broadcast
Put.It is of course also possible to when testing the television set to be measured, in the lump to the peritelevision machine and the normal sound of television set to be measured
Video playback is debugged.
The embodiment of the present invention gather auxiliary equipment playing standard audio-visual synchronization signal when caused audio signal S11 and
Vision signal S12, and according to the audio signal S11 and vision signal S12 of collection, obtain the audio frequency and video of the auxiliary equipment
Synchronization parameter value Δ S1；Collection Devices to test is recorded to be treated described in when the auxiliary equipment plays the Standard Audiovisual synchronizing signal
The audio signal S21 and vision signal S22 of measurement equipment output, and according to the audio signal S21 and vision signal of collection
S22, obtain the audio-visual synchronization parameter value Δ S2 of the Devices to test；According to the audio-visual synchronization parameter value Δ S1 of acquisition
With audio-visual synchronization parameter value Δ S2, the audio-visual synchronization value Δ S of the Devices to test is calculated；Wherein, the Δ S=Δs S2-
ΔS1；With the beneficial effect for shortening the broadcasting of intelligent TV set sound intermediate frequency and video playback time delay, lead to for television set in voice
The shortening effect of audio frequency and video time delay under words is especially notable.
The description tested about audio-visual synchronization test device of the present invention in specific test scene refer to Fig. 2 institutes
The description of embodiment is stated, will not be repeated here.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or device including a series of elements not only include those key elements, and
And also include the other element being not expressly set out, or also include for this process, method, article or device institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Other identical element also be present in the process of key element, method, article or device.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
The preferred embodiments of the present invention are the foregoing is only, not thereby limit its scope of the claims, it is every to utilize the present invention
The equivalent structure or equivalent flow conversion that specification and accompanying drawing content are made, directly or indirectly it is used in other related technology necks
Domain, it is included within the scope of the present invention.
Claims (8)
1. a kind of audio-visual synchronization method of testing, it is characterised in that comprise the following steps：
Caused audio signal S11 and vision signal S12 when gathering auxiliary equipment playing standard audio-visual synchronization signal, and root
According to the audio signal S11 and vision signal S12 of collection, the audio-visual synchronization parameter value Δ S1 of the auxiliary equipment is obtained；
When Devices to test records the auxiliary equipment and plays the Standard Audiovisual synchronizing signal, it is defeated to gather the Devices to test
The audio signal S21 and vision signal S22 gone out, and according to the audio signal S21 and vision signal S22 of collection, obtain institute
State the audio-visual synchronization parameter value Δ S2 of Devices to test；
According to the audio-visual synchronization parameter value Δ S1 of acquisition and audio-visual synchronization parameter value Δ S2, calculate and obtain described treat
The audio-visual synchronization value Δ S of measurement equipment；Wherein, the Δ S=Δs S2- Δs S1；
The audio-visual synchronization parameter value Δ S2 is the vision signal S22 and the audio signal S21 electricity in preset duration
Roll time difference value, calculate audio frequency and video parameter value of the preset duration of the audio-visual synchronization parameter value Δ S2 with calculating auxiliary equipment
Δ S1 preset duration is identical.
2. the method as described in claim 1, it is characterised in that the collection auxiliary equipment playing standard audio-visual synchronization signal
When caused audio signal S11 and vision signal S12, and according to the audio signal S11 and vision signal S12 of collection,
The step of audio-visual synchronization parameter value Δ S1 for obtaining the auxiliary equipment, includes：
When the auxiliary equipment plays the Standard Audiovisual synchronizing signal of exterior terminal input, using optical flame detector by described in
The vision signal of auxiliary equipment output is sent to the first passage of oscillograph, gathers the vision signal S12；
While the vision signal S12 is gathered, the audio signal for being exported the auxiliary equipment using voltage probe is transmitted
To the second channel of the oscillograph, the audio signal S11 is gathered；
According to the oscillograph on user interface simultaneously display the audio signal S11 corresponding to audio volume control and
Video waveform corresponding to the vision signal S12, obtain the vision signal S12 and audio signal S11 in preset duration
Voltage time delayed difference value, obtain the audio-visual synchronization parameter value Δ S1 of the auxiliary equipment.
3. method as claimed in claim 2, it is characterised in that the video for being exported the auxiliary equipment using optical flame detector
Signal is sent to the first passage of oscillograph, and the step of gathering the vision signal S12 includes：
The optical signal of the video image collected is converted into electric signal and by described in after conversion using the optical flame detector
Electric signal is sent to the first passage of oscillograph as vision signal S12, is regarded as described in the oscillograph will obtain after conversion
Frequency signal S12 is shown.
4. the method as described in claim any one of 1-3, it is characterised in that the machine core board of the auxiliary equipment and Devices to test
Hardware is identical.
5. a kind of audio-visual synchronization test device, it is characterised in that including signal acquisition module and synchronization value acquisition module；
The signal acquisition module is used for：
Caused audio signal S11 and vision signal S12 when gathering auxiliary equipment playing standard audio-visual synchronization signal, and root
According to the audio signal S11 and vision signal S12 of collection, the audio-visual synchronization parameter value Δ S1 of the auxiliary equipment is obtained；
When Devices to test records the auxiliary equipment and plays the Standard Audiovisual synchronizing signal, it is defeated to gather the Devices to test
The audio signal S21 and vision signal S22 gone out, and according to the audio signal S21 and vision signal S22 of collection, obtain institute
State the audio-visual synchronization parameter value Δ S2 of Devices to test；
The synchronization value acquisition module is used for：
According to the audio-visual synchronization parameter value Δ S1 of acquisition and audio-visual synchronization parameter value Δ S2, calculate and obtain described treat
The audio-visual synchronization value Δ S of measurement equipment；Wherein, the Δ S=Δs S2- Δs S1；
The audio-visual synchronization parameter value Δ S2 is the vision signal S22 and the audio signal S21 electricity in preset duration
Roll time difference value, calculate audio frequency and video parameter value of the preset duration of the audio-visual synchronization parameter value Δ S2 with calculating auxiliary equipment
Δ S1 preset duration is identical.
6. device as claimed in claim 5, it is characterised in that the signal acquisition module is additionally operable to：
When the auxiliary equipment plays the Standard Audiovisual synchronizing signal of exterior terminal input, using optical flame detector by described in
The vision signal of auxiliary equipment output is sent to the first passage of oscillograph, gathers the vision signal S12；
While the vision signal S12 is gathered, the audio signal for being exported the auxiliary equipment using voltage probe is transmitted
To the second channel of the oscillograph, the audio signal S11 is gathered；
According to the oscillograph on user interface simultaneously display the audio signal S11 corresponding to audio volume control and
Video waveform corresponding to the vision signal S12, obtain the vision signal S12 and audio signal S11 in preset duration
Voltage time delayed difference value, obtain the audio-visual synchronization parameter value Δ S1 of the auxiliary equipment.
7. device as claimed in claim 6, it is characterised in that the signal acquisition module is additionally operable to：
The optical signal of the video image collected is converted into electric signal and by described in after conversion using the optical flame detector
Electric signal is sent to the first passage of oscillograph as vision signal S12, is regarded as described in the oscillograph will obtain after conversion
Frequency signal S12 is shown.
8. the device as described in claim any one of 5-7, it is characterised in that the machine core board of the auxiliary equipment and Devices to test
Hardware is identical.
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| CN105608935A (en) * | 2015-12-29 | 2016-05-25 | 北京奇艺世纪科技有限公司 | Detection method and device of audio and video synchronization |
| CN105657418B (en) * | 2016-01-12 | 2018-11-16 | 深圳市通力科技开发有限公司 | The chrominance subcarrier frequency test method and system of vision signal |
| CN105763895A (en) * | 2016-04-15 | 2016-07-13 | 无锡天脉聚源传媒科技有限公司 | Sound processing method, device and system for multi-channel monitoring interface |
| CN106060534A (en) * | 2016-06-03 | 2016-10-26 | 公安部第三研究所 | System and method for testing synchronization of audio and video |
| CN106210842A (en) * | 2016-07-18 | 2016-12-07 | 乐视控股（北京）有限公司 | Control method for playing back and device |
| CN110446103B (en) * | 2018-05-04 | 2021-08-31 | 腾讯科技（深圳）有限公司 | Audio and video testing method and device and storage medium |
| CN108881992A (en) * | 2018-07-09 | 2018-11-23 | 深圳市潮流网络技术有限公司 | A kind of multimedia audio-video data synchronization calculation method |
| CN109842795B (en) * | 2019-02-28 | 2020-08-11 | 苏州科达科技股份有限公司 | Audio and video synchronization performance testing method and device, electronic equipment and storage medium |
| CN112423074B (en) * | 2020-11-11 | 2022-09-16 | 广州华多网络科技有限公司 | Audio and video synchronization processing method and device, electronic equipment and storage medium |
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| CA2541560C (en) * | 2006-03-31 | 2013-07-16 | Leitch Technology International Inc. | Lip synchronization system and method |
| CN101616331B (en) * | 2009-07-27 | 2011-07-20 | 北京汉邦高科数字技术有限公司 | Method for testing video frequency frame rate and audio-video synchronous performance |
| CN101742357B (en) * | 2009-12-29 | 2012-10-24 | 北京牡丹电子集团有限责任公司 | Method for measuring audio/video synchronous error of digital television device |
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