CN107315701B - Law enforcement recorder - Google Patents
Law enforcement recorder Download PDFInfo
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- CN107315701B CN107315701B CN201710525588.6A CN201710525588A CN107315701B CN 107315701 B CN107315701 B CN 107315701B CN 201710525588 A CN201710525588 A CN 201710525588A CN 107315701 B CN107315701 B CN 107315701B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
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- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Mobile Radio Communication Systems (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Telephone Function (AREA)
Abstract
The embodiment of the invention provides a law enforcement recorder. This law enforcement record appearance includes: the device comprises an interface module and a processing module; an interface module, comprising: a first pin unit and a second pin unit; wherein the first pin unit includes: the D + pin and the D-pin are respectively connected with the processing module and are used as USB data pins for carrying out data communication with external equipment; the second pin unit includes: the first detection pin and the second detection pin are respectively connected with the processing module; and the processing module is used for detecting the type of external equipment connected with the law enforcement recorder and whether a push-to-talk (PTT) button of the interphone is pressed down according to the level signals of the first detection pin and the second detection pin. The embodiment of the invention integrates different interface functions into one interface module, thereby improving the sealing effect of the whole machine.
Description
Technical Field
The embodiment of the invention relates to the field of electronic equipment, in particular to a law enforcement recorder.
Background
The law enforcement recorder is also called police law enforcement recorder or field law enforcement recorder. The digital camera shooting, digital camera shooting and talkback function are integrated, dynamic and static field conditions can be digitally recorded in the law enforcement process, and the digital camera shooting, digital camera shooting and talkback function is convenient for the public security officers to use in law enforcement in various environments. Law enforcement recorders are often used with walkie-talkies to which they may be connected to provide a sound pick-up and speaker for the walkie-talkie.
Fig. 1 is a schematic diagram of an interface of a conventional law enforcement recorder. As shown in fig. 1, in the conventional law enforcement recorder, three independent interfaces are respectively used for an earphone, a Universal Serial Bus (USB) charging and data transmission, and an interphone, but the law enforcement recorder has a high requirement for dust prevention and water prevention, so that the sealing effect of the whole machine is poor due to the adoption of a plurality of interfaces.
Disclosure of Invention
The embodiment of the invention provides a law enforcement recorder, which is used for solving the technical problem of poor sealing effect of the whole machine caused by adopting a plurality of interfaces in the prior art.
The embodiment of the invention provides a law enforcement recorder, which comprises:
the device comprises an interface module and a processing module;
wherein the interface module is electrically connected with the processing module;
the interface module includes: a first pin unit and a second pin unit;
wherein the first pin unit includes: the D + pin and the D-pin are respectively connected with the processing module and are used as USB data pins for carrying out data communication with external equipment;
the second pin unit includes: the first detection pin and the second detection pin are respectively connected with the processing module;
and the processing module is used for detecting the type of external equipment connected with the law enforcement recorder and whether a push-to-talk (PTT) button of the interphone is pressed down according to the level signals of the first detection pin and the second detection pin.
According to the law enforcement recorder provided by the embodiment of the invention, the first pin unit can realize the USB interface function, namely, the USB data interface and the charging interface, and the second pin unit and the processing module can also realize the detection of the type of the external equipment connected with the law enforcement recorder according to the first detection pin and the second detection pin and the detection of whether the push-to-talk (PTT) key of the interphone is pressed down, so that different interface functions are integrated into one interface module, and the sealing effect of the whole machine is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an interface of a prior art enforcement recorder;
FIG. 2 is a schematic view of an interface for a law enforcement recorder of the present invention;
FIG. 3 is a schematic structural diagram of a first embodiment of a law enforcement recorder provided by the present invention;
FIG. 4 is a schematic diagram of a connection to an intercom in accordance with an embodiment of the law enforcement recorder provided by the present invention;
FIG. 5 is a schematic diagram of a connection to an intercom of another embodiment of a law enforcement recorder provided by the present invention;
FIG. 6 is a schematic diagram of a connection to a headset of an embodiment of a law enforcement recorder provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
FIG. 2 is a schematic view of the interface of the law enforcement recorder of the present invention. Fig. 3 is a schematic structural diagram of a first law enforcement recorder embodiment provided by the present invention. As shown in fig. 3, the law enforcement recorder of the present embodiment may include:
the device comprises an interface module and a processing module;
the interface module is electrically connected with the processing module;
an interface module, comprising: a first pin unit and a second pin unit;
wherein, first pin unit includes: a D + pin and a D-pin respectively connected to the processing module, and configured to perform data communication with an external device as a Universal Serial Bus (USB) data pin;
a second pin unit comprising: a first detection pin PTT _ DET and a second detection pin HS _ DET which are respectively connected with the processing module;
and the processing module is used for detecting the type of external equipment connected with the law enforcement recorder and whether a Push to Talk (PTT for short) key of the interphone is pressed down according to the level signals of the first detection pin PTT _ DET and the second detection pin HS _ DET.
Specifically, the processing module is used for detecting whether the external equipment connected with the law enforcement recorder is an interphone or not according to a first detection pin PTT _ DET of the second pin unit;
the processing module is also used for detecting whether a PTT key of the interphone is pressed down or not when detecting that the external equipment connected with the law enforcement recorder is the interphone according to the level signal of the first detection pin PTT _ DET; or, the device is further used for detecting whether the external device connected with the law enforcement recorder is an earphone or not when detecting that the external device connected with the law enforcement recorder is a non-interphone according to the level signal of the first detection pin PTT _ DET.
For example, when the level signal of the first detection pin PTT _ DET is detected to be a low level signal, it is determined that the external device connected to the law enforcement recorder is an intercom, and at this time, if the level signal of the second detection pin HS _ DET is also detected to be a low level signal, it is determined that the PTT key of the intercom is pressed, the radio frequency channel of the intercom is turned on, the signal collected by the microphone of the law enforcement recorder is received or sent to the law enforcement recorder, and correspondingly, the law enforcement recorder turns on the microphone bias voltage to enable the microphone to turn on the voice sending function, and the signal collected by the microphone of the law enforcement recorder is sent to the intercom, or the signal sent by the intercom is received, that is, the law enforcement recorder can be used as a sound pickup and a speaker of the intercom.
For example, when the level signal of the first detection pin PTT _ DET is detected to be a high level signal, if the level signal of the second detection pin HS _ DET is detected to be a low level signal, it indicates that the external device connected to the law enforcement recorder is an earphone; if the level signal of the second detection pin HS _ DET is detected to be a high level signal, it indicates that the earphone and the interphone are not inserted into the interface module of the law enforcement recorder.
See table 1 below for details.
TABLE 1
The first pin unit, which is a USB interface pin, may include: a power line VBUS pin, a ground line GND pin, a D + pin and a D-pin; the D + pin and the D-pin are used as USB data pins for carrying out data communication with external equipment; the first pin unit can also be used as a charging interface.
As shown in fig. 2, in the method of this embodiment, different external devices are connected through an interface module.
The law enforcement recorder of this embodiment through first pin unit, can realize USB's interface function, as USB data interface and the interface that charges promptly, can also realize detecting the pin according to first detection pin and second through second pin unit and processing module, detect with the type of the external equipment that law enforcement recorder links to each other to and whether the PTT button of talkbacking of detecting the intercom is pressed, consequently integrate different interface functions to an interface module, improved the sealed effect of complete machine.
Fig. 4 is a schematic diagram of a connection between the law enforcement recorder and an intercom according to an embodiment of the present invention. Fig. 5 is a schematic diagram of a connection between a law enforcement recorder and an intercom according to another embodiment of the present invention. FIG. 6 is a schematic diagram of a connection to a headset of an embodiment of a law enforcement recorder provided by the present invention. On the basis of the above embodiment, as shown in fig. 4, the law enforcement recorder of the present embodiment may further include:
one end of the PTT enabling pin PTT-EN is connected with a PTT key of the law enforcement recorder, and the other end of the PTT enabling pin PTT-EN is connected with the processing module;
the processing module is also used for enabling the level signal of the PTT-EN of the PTT enabling pin to be a high level signal when the PTT key of the law enforcement recorder is pressed;
and the switching tube Q is used for being conducted under the control of the PTT enable pin PTT-EN so as to change the level of the second detection pin HS _ DET.
Optionally, the switching tube Q is a field effect transistor MOS, as shown in fig. 4, a gate of the MOS Q is connected to the other end of the PTT enable pin PTT-EN, a drain of the MOS Q is connected to the second detection pin HS _ DET, and a source of the MOS Q is grounded.
Further, the processing module is further configured to:
and when the fact that the PTT key of the law enforcement recorder is pressed is detected, the microphone bias voltage is started, so that the microphone of the law enforcement recorder starts the voice transmission function.
Further, as shown in fig. 5 and 6, the second pin unit further includes:
the first multiplexing pin is connected with an audio coding and decoding module of the law enforcement recorder or a microphone unit of the law enforcement recorder, and the second multiplexing pin is connected with an audio coding and decoding module of the law enforcement recorder or a loudspeaker unit of the law enforcement recorder;
the first multiplexing pin is used as a sound channel pin HPL of an earphone or an audio output signal pin PTT _ MIC of the law enforcement recorder;
and the second multiplexing pin is used as a microphone pin MIC of an earphone or an audio input signal pin PTT _ SPK of the law enforcement recorder.
Specifically, as shown in fig. 4, when it is detected that the level signal of the first detection pin PTT _ DET is a low level signal, it indicates that the external device connected to the law enforcement recorder is an intercom, when the PTT key of the law enforcement recorder is pressed, the processing module detects that the PTT key is pressed (specifically, the PTT key is pressed through interruption), the level signal of the PTT enable pin PTT-EN is enabled to be a high level signal, the microphone bias voltage is turned on, the microphone starts the speech function, and the signal collected by the microphone is transmitted to the intercom or receives the signal transmitted by the intercom, and since the level signal of the PTT enable pin-EN is a high level signal, the switching tube is turned on, at this time, the level signal of the second detection pin HS _ DET is changed from a high level signal to a low level signal, the processor of the intercom detects that the second detection pin is pulled down through the IO port, and if the PTT key of the law enforcement recorder is determined to be pressed, the radio frequency channel of the interphone is opened, and the signal sent by the microphone of the law enforcement recorder is received or sent to the law enforcement recorder.
The following table 2 is a way of multiplexing pins of the interface module, and pins 1, 3, 5, 7, and 9 are multiplexing pins of the earphone and the interphone equipment; wherein, the pin 1 is a GND pin (not shown), the pin 3 is a multiplexing pin of a channel pin HPL (shown in fig. 6) of the headset or an audio output signal pin PTT _ MIC (shown in fig. 5) of the law enforcement recorder, the pin 7 is a multiplexing pin of a microphone pin MIC (shown in fig. 6) of the headset or an audio input signal pin PTT _ SPK (shown in fig. 5) of the law enforcement recorder, and the pin 5 and the pin 9 are respectively a second detection pin HS _ DET and a first detection pin PTT _ DET. The first multiplexing pin is pin 3, and the second multiplexing pin is pin 7.
Pin 2 is a VBUS pin, pin 4 and pin 6 are a D + pin and a D-pin, respectively, pin 8 is a detection determination pin (not shown in The figure) of an external connection (On-The-Go, short OTG) device, such as an OTG device like a USB mouse, and pin 10 is a GND pin.
TABLE 2
Specifically, an analog switch may be connected between the law enforcement recorder audio codec module and the first multiplexing pin (the HPL pin in fig. 6), and between the first multiplexing pin (the PTT _ MIC pin in fig. 5) and the mike unit of the law enforcement recorder, respectively, and the analog switch may be controlled by the processing module;
an analog switch may be connected between the audio codec module of the law enforcement recorder and the second multiplexing pin (MIC pin in fig. 6), and between the second multiplexing pin (PTT _ SPK pin in fig. 5) and the speaker unit of the law enforcement recorder, respectively, and the analog switches may be controlled by the processing module.
Table 3 shows the pin status corresponding to the intercom and the headset when they are plugged in. As shown in fig. 5, when the interface of the intercom is inserted into the interface module of the law enforcement recorder, the pin 9, i.e., the first detection pin PTT _ DET, outputs a low level signal, which is equivalent to grounding, and at this time, the processing module is configured to detect whether the push-to-talk PTT key of the intercom is pressed according to the pin 5, i.e., the second detection pin HS _ DET. And the pin 3 is used as an audio output signal pin PTT _ MIC of the law enforcement recorder, is connected with a microphone unit of the law enforcement recorder, and is simultaneously connected with an audio codec of an interphone. The pin 7 is used as an audio input signal pin PTT _ SPK of the law enforcement recorder, is connected with a loudspeaker unit of the law enforcement recorder, and is also connected with an audio codec of an interphone.
As shown in fig. 6, when the interface of the headphone is inserted into the interface module of the law enforcement recorder, the pin 9, i.e., the first detection pin PTT _ DET, is floating, and at this time, the processing module is configured to detect whether the headphone is inserted according to the pin 5, i.e., the second detection pin HS _ DET, and if the pin 5, i.e., the second detection pin HS _ DET, outputs a low level signal, which is equivalent to ground, it indicates that the headphone is inserted. And the pin 3 is used as a sound channel pin HPL of the earphone, is connected with an audio coding and decoding module of the law enforcement recorder and is simultaneously connected with a loudspeaker unit of the earphone. The pin 7 is used as a microphone pin MIC of the earphone, is connected with an audio coding and decoding module of the law enforcement recorder, and is simultaneously connected with a microphone unit of the earphone.
TABLE 3
On the basis of the foregoing embodiment, further, optionally, the processing module is specifically configured to:
and according to the level signal of the second detection pin, when the PTT key of the interphone is detected to be pressed down, the microphone bias voltage is started, so that the microphone of the law enforcement recorder starts the voice transmission function.
Specifically, as shown in fig. 4, when it is detected that the external device connected to the law enforcement recorder is an intercom according to the level signal of the first detection pin PTT _ DET, that is, the level signal of the first detection pin PTT _ DET is a low level signal, and when it is detected that the push-to-talk PTT button of the intercom is pressed according to the level signal of the second detection pin HS _ DET, that is, the level signal of the second detection pin HS _ DET is also a low level signal, the processor turns on the microphone bias voltage, so that the microphone of the law enforcement recorder turns on the voice transmission function.
In the above specific embodiment, when the external device is an intercom, the user can effectively identify and activate the microphone function of the law enforcement recorder by pressing the PTT key of the intercom or the law enforcement recorder in consideration of various habits of the user, that is, the intercom provides the functions of a sound pickup and a speaker.
The law enforcement recorder in the embodiment of the invention realizes the connection of 3 external devices with different interface types through one 10pinUSB interface, and has lower cost.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A law enforcement recorder, comprising:
the device comprises an interface module and a processing module;
wherein the interface module is electrically connected with the processing module;
the interface module includes: a first pin unit and a second pin unit;
wherein the first pin unit includes: the D + pin and the D-pin are respectively connected with the processing module and are used as USB data pins for carrying out data communication with external equipment;
the second pin unit includes: the first detection pin and the second detection pin are respectively connected with the processing module;
the processing module is used for detecting the type of external equipment connected with the law enforcement recorder and whether a push-to-talk (PTT) button of the interphone is pressed down according to the level signals of the first detection pin and the second detection pin;
further comprising:
the PTT enabling pin is connected with the processing module;
the processing module is further used for enabling the level signal of the PTT enabling pin to be a high level signal when the PTT key of the law enforcement recorder is detected to be pressed;
and the switching tube is used for being conducted under the control of the PTT enabling pin so as to change the level of the second detection pin.
2. The law enforcement recorder of claim 1, wherein the switch transistor is a MOS transistor, a gate of the MOS transistor is connected to the PTT enable pin, a drain of the MOS transistor is connected to the second detection pin, and a source of the MOS transistor is grounded.
3. The law enforcement recorder of claim 1 or 2, wherein the second pin unit further comprises:
the first multiplexing pin is connected with an audio coding and decoding module of the law enforcement recorder or a microphone unit of the law enforcement recorder, and the second multiplexing pin is connected with an audio coding and decoding module of the law enforcement recorder or a loudspeaker unit of the law enforcement recorder;
the first multiplexing pin is used as a sound channel pin of an earphone or an audio output signal pin of the law enforcement recorder;
and the second multiplexing pin is used as a microphone pin of an earphone or an audio input signal pin of the law enforcement recorder.
4. Law enforcement recorder according to claim 1 or 2, characterized in that the processing module is specifically configured to:
and when the processing module detects that the external equipment connected with the law enforcement recorder is an interphone according to the level signal of the first detection pin, detecting whether a push-to-talk (PTT) key of the interphone is pressed down according to the level signal of the second detection pin.
5. Law enforcement recorder according to claim 1 or 2, characterized in that the processing module is specifically configured to:
when the processing module detects that the external equipment connected with the law enforcement recorder is a non-interphone according to the level signal of the first detection pin, whether the external equipment connected with the law enforcement recorder is an earphone or not is detected according to the level signal of the second detection pin.
6. The law enforcement recorder of claim 1 or 2, wherein the processing module is further configured to:
and when the fact that the PTT key of the law enforcement recorder is pressed is detected, the microphone bias voltage is started, so that the microphone of the law enforcement recorder starts the voice transmission function.
7. The law enforcement recorder of claim 4, wherein the processing module is specifically configured to:
and according to the level signal of the second detection pin, when the PTT key of the interphone is detected to be pressed down, the microphone bias voltage is started, so that the microphone of the law enforcement recorder starts the voice transmission function.
8. The law enforcement recorder of claim 1 or 2, wherein the first pin unit further comprises:
a power supply line VBUS pin and a ground line GND pin.
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| CN201710525588.6A CN107315701B (en) | 2017-06-30 | 2017-06-30 | Law enforcement recorder |
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| CN201710525588.6A CN107315701B (en) | 2017-06-30 | 2017-06-30 | Law enforcement recorder |
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| CN107315701B true CN107315701B (en) | 2020-08-25 |
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| CN108874713B (en) * | 2018-05-31 | 2021-10-22 | 联想(北京)有限公司 | Information processing method and device |
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| CN101350989A (en) * | 2008-08-18 | 2009-01-21 | 嘉兴闻泰通讯科技有限公司 | Plug adapter for a mobile terminal |
| CN102546869A (en) * | 2012-01-06 | 2012-07-04 | 海能达通信股份有限公司 | USB (Universal Serial Bus) interface multiplexing interphone and control method thereof |
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Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee after: Qingdao Hisense Mobile Communication Technology Co.,Ltd. Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee before: HISENSE MOBILE COMMUNICATIONS TECHNOLOGY Co.,Ltd. |
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