CN108924462A - A kind of video talkback unit of law-enforcing recorder - Google Patents
A kind of video talkback unit of law-enforcing recorder Download PDFInfo
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- CN108924462A CN108924462A CN201810546963.XA CN201810546963A CN108924462A CN 108924462 A CN108924462 A CN 108924462A CN 201810546963 A CN201810546963 A CN 201810546963A CN 108924462 A CN108924462 A CN 108924462A
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- 108010076504 Protein Sorting Signals Proteins 0.000 abstract description 14
- 239000012528 membrane Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 6
- 230000008054 signal transmission Effects 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/142—Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Human Computer Interaction (AREA)
- Computational Linguistics (AREA)
- Quality & Reliability (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Security & Cryptography (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Hardware Design (AREA)
- Telephonic Communication Services (AREA)
Abstract
The invention discloses a kind of video talkback units of law-enforcing recorder, including intercom, rack, distant client, keynote video input device, keynote video output device, first signal adapter, radio transmission device, audio-video processing unit, second signal converter, secondary audio-video input unit, secondary audio-visual output device and native client, the intercom is slidably installed on the rack, the side of intercom is fixedly installed with display screen, and the side wall of intercom is located above display screen and is fixedly installed with camera, the side wall of intercom, which is located at below display screen, is provided with membrane keyboard and loudspeaker, power key is installed on the side wall of intercom.In the present invention, video intercommunication estimated value processor is updated, adjustment weighting coefficient by specific algorithm to each sample value of input signal sequence, is kept mean square error of the output signal sequence compared with desired output signal sequence minimum.
Description
Technical field
The present invention relates to video intercommunication technical field more particularly to a kind of video talkback units of law-enforcing recorder.
Background technique
In law-enforcing recorder, plateform system video intercommunication, need to carry out both sides or multi-party real-time voice and video
Exchange is usually all that will necessarily be generated echo in this way using external loudspeaker playback, i.e., after a side speaks, be passed through the loudspeaker of other side
Then playback is collected by the microphone of other side again and returns to oneself, if do not handled echo, it will influence call and
Video quality will form sound concussion, and generation is uttered long and high-pitched sounds, and technology is needed to implement echo cancellor, and existing echo cancelling device is main
Using echo estimated value processor, the raw electrical signal that the electric signal that local user issues is issued with remote subscriber is compared
Compared with when comparison result is in the threshold range of setting, then the repetition electric signal in electric signal that local user issues being deleted
It removes.
But this method has the following disadvantages：Echo estimated value processor is the statistical property with input and output signal
Be estimated as foundation, take special algorithm automatically to adjust processor coefficient, reach a kind of algorithm of optimum filtering characteristic
Or device, echo estimated value processor are updated, adjustment weighting each sample value of input signal sequence by specific algorithm
Coefficient keeps mean square error of the output signal sequence compared with desired output signal sequence minimum, i.e., output signal sequence is forced
In the recent period hope signal sequence, in this process, need echo estimated value processor restrain after retention coefficient stablize, with guarantee not by
The interference of the output data of remote subscriber in local user's sound and video input device, on the other hand needs at echo estimated value
Reason device keep more new state at any time, with guarantee tracking variation echo path, echo estimated value processor fast convergence and
Paradox between the stability of height constrains the development of video intercommunication technology.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of view of the law-enforcing recorder proposed
Frequency talkback unit.
To achieve the goals above, present invention employs following technical solutions：
A kind of video talkback unit of law-enforcing recorder, including intercom, rack, distant client, keynote video input dress
It sets, the conversion of keynote video output device, the first signal adapter, radio transmission device, audio-video processing unit, second signal
Device, secondary audio-video input unit, secondary audio-visual output device and native client, the intercom is slidably installed on the rack, right
Say that the side of machine is fixedly installed with display screen, and the side wall of intercom is located above display screen and is fixedly installed with camera, it is right
It says the side wall of machine to be located at below display screen to be provided with membrane keyboard and loudspeaker, power key is installed on the side wall of intercom, distal end
The output end of user is connected with the input terminal of keynote video input device, and the input terminal of remote subscriber and the output of keynote video
The output end of device is connected, and the output end of keynote video input device is connect with the input terminal of the first signal adapter, and first
Signal adapter is connect with radio transmission device, and radio transmission device is connect with audio-video processing unit, audio-video processing
Device is connect with second signal converter, and the input terminal of the output end of second signal converter and secondary audio-visual output device connects
It connects, the output end of secondary audio-video input unit is connect with the input terminal of second signal converter, the output end and pair of native client
The input terminal of audio-video input unit is connected, and the input terminal of native client is connected with the output end of secondary audio-visual output device
It connects.
Preferably, the audio-video processing unit includes memory, echo estimated value processor, sound frequency threshold process
The input terminal of device and sound intensity processor threshold, the output end of radio transmission device and memory connects, memory it is defeated
Outlet is connect with the input terminal of the input terminal of second signal converter, echo estimated value processor respectively, the processing of echo estimated value
The output end of device is connect with the input terminal of sound frequency processor threshold, and the output end and sound of sound frequency processor threshold are rung
The input terminal connection of processor threshold is spent, the output end of sound intensity processor threshold and the input terminal of radio transmission device connect
It connects.
Preferably, the memory includes the main memory of law-enforcing recorder, the additional storage of law-enforcing recorder, network
Transmission module and network cloud disk.
Preferably, the network cloud disk is connect with firewall, and firewall includes key generator, cipher controlled device, key
Decipher and authentication module, key generator, cipher controlled device and key decipher are used for checking or managing to network cloud disk
Reason, authentication module login network cloud disk for user, and authentication module is unlocked by fingerprint device or finger-impu system.
Preferably, the side in the rack far from display screen is fixedly connected with strip.
Preferably, limiting slot is offered on the two sidewalls of the intercom, is fixedly connected on the two sides inner wall of rack limited
Position item, positive stop strip are slidably mounted in limiting slot.
Compared with prior art, the beneficial effects of the invention are as follows：In the present invention, video intercommunication estimated value processor is to input
Each sample value of signal sequence is updated, adjustment weighting coefficient by specific algorithm, is made output signal sequence and desired output
The mean square error that signal sequence compares is minimum, in this process, keeps system after the convergence of video intercommunication estimated value processor
Number is stablized, and in the fixed time period after coefficient keeps stablizing, coefficient is remained unchanged, that is, thinks in fixed time period, distal end
The external interference amount of geographical environment locating for user and local user is constant, can guarantee so not by local user's voice input
The interference of the output data of remote subscriber in device improves the effect of video intercommunication, present invention video in fixed time period
The coefficient of intercommunication estimated value processor remains unchanged, in order to guarantee the reliability of video intercommunication within the time period, by video pair
Say that the output end of estimated value processor is successively handled with sound and video frequencies processor threshold and sound intensity and video threshold
Device connection, ensure that the effect of video intercommunication in time period, totally improves the efficiency and effect of video intercommunication.
Detailed description of the invention
Fig. 1 is a kind of intercom schematic view of the front view of the video talkback unit of law-enforcing recorder proposed by the present invention；
Fig. 2 is a kind of intercom side structure schematic view of the video talkback unit of law-enforcing recorder proposed by the present invention；
Fig. 3 is a kind of functional block diagram of the video talkback unit of law-enforcing recorder proposed by the present invention.
In figure：1 intercom, 2 racks, 3 display screens, 4 cameras, 5 membrane keyboards, 6 loudspeaker, 7 power keys, 8 strips.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1-3, the video talkback unit of a kind of law-enforcing recorder, including intercom 1, rack 2, distant client, master
Audio-video input unit, keynote video output device, the first signal adapter, radio transmission device, audio-video processing unit,
Second signal converter, secondary audio-video input unit, secondary audio-visual output device and native client, intercom 1 are slidably mounted on
In rack 2, the side of intercom 1 is fixedly installed with display screen 3, and the side wall of intercom 1 is located at the fixed peace in top of display screen 3
Equipped with camera 4, the lower section that the side wall of intercom 1 is located at display screen 3 is provided with membrane keyboard 5 and loudspeaker 6, the side wall of intercom 1
On power key 7 is installed, the output end of remote subscriber is connected with the input terminal of keynote video input device, and remote subscriber
Input terminal is connected with the output end of keynote video output device, and the output end of keynote video input device and the first signal are converted
The input terminal of device connects, and the first signal adapter is connect with radio transmission device, and radio transmission device and audio-video are handled
Device connection, audio-video processing unit are connect with second signal converter, the output end of second signal converter and secondary audio-video
The input terminal of output device connects, and the output end of secondary audio-video input unit is connect with the input terminal of second signal converter, this
The output end of ground client is connected with the input terminal of secondary audio-video input unit, and the input terminal of native client and secondary audio-video are defeated
The output end of device is connected out, and audio-video processing unit includes memory, echo estimated value processor, at sound frequency threshold value
Device and sound intensity processor threshold are managed, the output end of radio transmission device and the input terminal of memory connect, memory
Output end is connect with the input terminal of the input terminal of second signal converter, echo estimated value processor respectively, at echo estimated value
The output end of reason device is connect with the input terminal of sound frequency processor threshold, the output end and sound of sound frequency processor threshold
The input terminal of loudness threshold processor connects, the output end of sound intensity processor threshold and the input terminal of radio transmission device
Connection, memory includes the main memory of law-enforcing recorder, the additional storage of law-enforcing recorder, network transmission module and network
Cloud disk, network cloud disk are connect with firewall, and firewall includes key generator, cipher controlled device, key decipher and certification mould
Block, key generator, cipher controlled device and key decipher are used for checking or managing to network cloud disk, and authentication module is used for
User logins network cloud disk, and authentication module is unlocked by fingerprint device or finger-impu system, separate display screen 3 in rack 2
Side is fixedly connected with strip 8, and limiting slot is offered on the two sidewalls of intercom 1, is fixedly connected on the two sides inner wall of rack 2
Positive stop strip, positive stop strip are slidably mounted in limiting slot, and in the present invention, video intercommunication estimated value processor is to input signal sequence
Each sample value is updated, adjustment weighting coefficient by specific algorithm, is made output signal sequence and desired output signal sequence phase
The mean square error compared is minimum, and in this process, retention coefficient is stablized after the convergence of video intercommunication estimated value processor, is being
Number is kept in the fixed time period after stablizing, and coefficient remains unchanged, that is, is thought in fixed time period, and remote subscriber is used with local
The external interference amount of geographical environment locating for family is constant, can guarantee so not by distally using in local user's acoustic input dephonoprojectoscope
The interference of the output data at family improves the effect of video intercommunication, and the present invention is in fixed time period at video intercommunication estimated value
The coefficient of reason device remains unchanged, in order to guarantee the reliability of video intercommunication within the time period, by the processing of video intercommunication estimated value
The output end of device is successively connect with sound and video frequencies processor threshold and sound intensity and video threshold processor, ensure that
The effect of video intercommunication in time period totally improves the efficiency and effect of video intercommunication.
Working principle：In use, keynote video input device gives the sound that distant client issues and video signal transmission
The received sound of keynote video input device and vision signal are converted to telecommunications by the first signal adapter, the first signal adapter
Number and be transferred to radio transmission device, radio transmission device gives electric signal transmission to audio-video processing unit, at audio-video
Video intercommunication processing unit inside reason device is stored electric signal by memory, and passes through echo estimated value processor
It carries out convergence and the model coefficient within the set time is calculated, electric signal transmission gives second to audio video processor by treated
Signal adapter, electric signal is passed to secondary audio-visual output device by second signal converter, and passes through secondary audio-video output dress
It sets and converts electrical signals to video intercommunication number and be transferred to local user, the transmitting of information for the first time, secondary audio-video input are carried out with this
Device is by the video intercommunication signal (sound and view of sound and vision signal and remote subscriber including local user of local user
Frequency signal) it is transferred to second signal converter, second signal converter is by the received sound of secondary audio-video input unit and video
Signal is converted to electric signal transmission and is matched to audio video processor with the electric signal in echo estimated value processor, will match
The electric signal spent in threshold range screens, and is transferred to sound frequency processor threshold, since video intercommunication is used in distal end
During transmitting between family and local user, echo overlapping can cause gradually rising for echo frequency, and frequency is higher than threshold value
Electric signal screened, and electric signal is transferred to sound intensity processor threshold, since echo is in the initial stage of propagation
Loudness is more other, and sound is smaller, by loudness lower than the electricity that the electric signal of threshold value screens, and will meet above-mentioned all conditions
Signal is deleted, and the electric signal after deletion is transferred to the first signal adapter, the first signal by radio transmission device
Received electric signal is passed to keynote video output device by converter, and is converted electric signal by keynote video output device
For video intercommunication signal, it is finally transferred to distant client.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of video talkback unit of law-enforcing recorder, including intercom (1), rack (2), distant client, keynote video are defeated
Enter device, keynote video output device, the first signal adapter, radio transmission device, audio-video processing unit, second signal
Converter, secondary audio-video input unit, secondary audio-visual output device and native client, which is characterized in that the intercom (1) is sliding
Dynamic to be mounted on rack (2), the side of intercom (1) is fixedly installed with display screen (3), and the side wall of intercom (1) is positioned at aobvious
It is fixedly installed with above display screen (3) camera (4), the side wall of intercom (1), which is located at below display screen (3), is provided with touch
Key (5) and loudspeaker (6) are equipped with power key (7) on the side wall of intercom (1), and the output end and keynote video of remote subscriber are defeated
The input terminal for entering device is connected, and the input terminal of remote subscriber is connected with the output end of keynote video output device, keynote
The output end of video input device is connect with the input terminal of the first signal adapter, and the first signal adapter and wireless radio transmission fill
Connection is set, radio transmission device is connect with audio-video processing unit, and audio-video processing unit is connect with second signal converter,
The output end of second signal converter is connect with the input terminal of secondary audio-visual output device, the output end of secondary audio-video input unit
It is connect with the input terminal of second signal converter, the output end of native client is connected with the input terminal of secondary audio-video input unit
It connects, and the input terminal of native client is connected with the output end of secondary audio-visual output device.
2. a kind of video talkback unit of law-enforcing recorder according to claim 1, which is characterized in that at the audio-video
Reason device includes memory, echo estimated value processor, sound frequency processor threshold and sound intensity processor threshold, wirelessly
The output end of device for transporting electricity at heavy and the input terminal of memory connect, and the output end of memory is defeated with second signal converter respectively
Enter the input terminal connection at end, echo estimated value processor, the output end and sound frequency threshold process of echo estimated value processor
The input terminal of device connects, and the output end of sound frequency processor threshold is connect with the input terminal of sound intensity processor threshold, sound
The output end of sonority processor threshold and the input terminal of radio transmission device connect.
3. a kind of video talkback unit of law-enforcing recorder according to claim 2, which is characterized in that the memory packet
Include the main memory of law-enforcing recorder, the additional storage of law-enforcing recorder, network transmission module and network cloud disk.
4. a kind of video talkback unit of law-enforcing recorder according to claim 3, which is characterized in that the network cloud disk
It being connect with firewall, firewall includes key generator, cipher controlled device, key decipher and authentication module, key generator,
Cipher controlled device and key decipher are used for checking or managing to network cloud disk, and authentication module logins network cloud for user
Disk, authentication module are unlocked by fingerprint device or finger-impu system.
5. a kind of video talkback unit of law-enforcing recorder according to claim 1, which is characterized in that the rack (2)
The upper side far from display screen (3) is fixedly connected with strip (8).
6. a kind of video talkback unit of law-enforcing recorder according to claim 1, which is characterized in that the intercom
(1) limiting slot is offered on two sidewalls, is fixedly connected with positive stop strip on the two sides inner wall of rack (2), positive stop strip is slidably installed
In limiting slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810546963.XA CN108924462A (en) | 2018-05-31 | 2018-05-31 | A kind of video talkback unit of law-enforcing recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810546963.XA CN108924462A (en) | 2018-05-31 | 2018-05-31 | A kind of video talkback unit of law-enforcing recorder |
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| Publication Number | Publication Date |
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| CN108924462A true CN108924462A (en) | 2018-11-30 |
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| CN201810546963.XA Pending CN108924462A (en) | 2018-05-31 | 2018-05-31 | A kind of video talkback unit of law-enforcing recorder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115002569A (en) * | 2022-08-03 | 2022-09-02 | 深圳市星网信通科技有限公司 | Converged communication method based on portable device, server and storage medium |
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| US20100073455A1 (en) * | 2008-09-25 | 2010-03-25 | Hitachi, Ltd. | Television receiver with a TV phone function |
| CN205847252U (en) * | 2016-07-29 | 2016-12-28 | 深圳亿络科技有限公司 | A kind of police individual soldier's law-enforcing recorder based on 4G network |
| CN107888888A (en) * | 2017-12-14 | 2018-04-06 | 成都合能智发科技有限公司 | A kind of multi-functional law-enforcing recorder |
| CN107958671A (en) * | 2017-11-22 | 2018-04-24 | 广州市六体智能科技有限公司 | A kind of echo cancelling device of law-enforcing recorder |
-
2018
- 2018-05-31 CN CN201810546963.XA patent/CN108924462A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100073455A1 (en) * | 2008-09-25 | 2010-03-25 | Hitachi, Ltd. | Television receiver with a TV phone function |
| CN205847252U (en) * | 2016-07-29 | 2016-12-28 | 深圳亿络科技有限公司 | A kind of police individual soldier's law-enforcing recorder based on 4G network |
| CN107958671A (en) * | 2017-11-22 | 2018-04-24 | 广州市六体智能科技有限公司 | A kind of echo cancelling device of law-enforcing recorder |
| CN107888888A (en) * | 2017-12-14 | 2018-04-06 | 成都合能智发科技有限公司 | A kind of multi-functional law-enforcing recorder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115002569A (en) * | 2022-08-03 | 2022-09-02 | 深圳市星网信通科技有限公司 | Converged communication method based on portable device, server and storage medium |
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| CB03 | Change of inventor or designer information | ||
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Inventor after: Fang Gengsen Inventor after: Tu Xiangpeng Inventor before: Tu Xiangpeng Inventor before: Fang Gengsen |
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Application publication date: 20181130 |