Network Camera Video Surveillance System has become an indispensable method for urban security systems. Many cities have video surveillance and construction. For network HD cameras, they can be equipped with common lenses called megapixels, and can also be equipped with 1 million HD lenses. , can be equipped with 3 million HD lenses, but in the case of using the same camera, the final performance of the screen, the resolution of the lens played a decisive role, but the voice also plays an important role in video surveillance, the following describes how to Troubleshoot the sound in your webcam!
1, first determine whether the network camera audio input is, LINEIN (linear level)
2, if it is to determine the LINE audio input port, then check the microphone power supply is normal, check the pickup connection is correct.
3, first check, pick up the audio signal output connection, the general network camera audio input connector is 3.5 headphone connector, then the corresponding pickup audio signal line, it is necessary to switch to 3.5 headphone connector.
4, need to pay attention, although you connected the 3.5 headphone connector, but 3.5 connector, he is divided into dual-channel and single-channel points, that is, stereo and mono, check your 3.5 connector is double The channel is still single-channel.
5, if the confirmation is mono, then the positive electrode of the pickup is connected to the positive electrode of 3.5, and the negative electrode corresponds to the negative electrode. If you have two channels, then there will be a three-core cable, the negative electrode of the pickup is connected to the negative electrode of 3.5, and the positive electrode is connected to the other two wires corresponding to the 3.5 connector, which are the left and right channels respectively.
6, there is a situation is that some of the current brand of network camera audio input is also available, LINE and MIC input, that is to say an audio input port, he may be the left channel is LINE right channel is MIC, In such a situation, you cannot connect the left and right channels together to connect the positive pole of 3.5. For example, if the negative electrode is connected to the negative electrode, the positive electrode is connected to one of the 3.5 connectors, and then listen to the sound. If it is not normal, change it to another audio cable. But can't carry on the parallel connection of the left and right channels, also forbid to use the monophonic 3.5 joints, must use the dual-channel joint.
7, the connector is the international standard interface, if the 3.5 headphone connector has two black lines, that represents a dual-channel interface, the two black lines are actually from the insulating ring, the most pointed part of the top of the 3.5 connector stereo In the left channel, the middle of the insulation ring is the right channel, and the negative electrode at the root is the ground. If it is a mono 3.5 connector, the opposite is to see only a black insulating ring, that is, the tip is positive, the root to the negative.
8, with audio network camera audio output connected to the nvr audio input how no sound
The audio on the network camera and NVR is used for audio monitoring and talkback. The usage of audio monitoring: This is the use of a one-way sound. It is only the sound from the camera side to the NVR side. This usage requires the camera side. There is an audio input port connected to the microphone or camera with a microphone, only need to open the audio recording on the NVR, the NVR audio output port connected to a speaker, the camera side of the sound can be transmitted to the NVR, recording in the NVR, and through the speaker sound.
Audio intercom usage: This is the use of a two-way audio. It requires an audio input port on the camera to connect to a microphone or a microphone, and the camera has an audio output port that can be connected to a speaker or its own speaker. The NVR has audio input and Output port, the direction of the sound is the camera's input port to the microphone or the microphone's own voice through the network to the NVR, NVR audio output port to the speaker output sound, NVR's audio input port to the microphone to transfer the sound to the camera, through The audio output port of the camera is sounded by the speaker.
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