Rifatron Co., Ltd.

Sam Myung Co., Ltd.

Jung-Jae Park

The present invention is related to a digital video recording method, and in particular, when a recording mode is audio detection, according to an audio signal transmitted from a mike mounted on a camera or a mike mounted separately, this method records the video taken by said camera during the time period for which a recording speed and video resolution is already set as super-high speed and high video resolution. After the elapse of an already set time period, when the audio signal is sensed, this method records the video by varying the recording speed and video resolution from super-high speed and high video resolution into low-speed and low video resolution at a time interval which is already set. Therefore, it becomes possible to obtain the specific information about the video data which is important in an unmanned security system.

Digital video recording method in an audio detection mode

A digital video recorder is described. The digital video recorder may include a plurality of male slots, an image compression substrate connected to a first one of the plurality of male slots, and a function expansion substrate connected to a second one of the plurality of male slots. The image compression substrate may accommodate a plurality of image channels and may support a high-speed data bus dedicated for an image. The function expansion substrate may support a PCI type device. Moreover, the function expansion substrate and the image compression substrate may use separate buses, thereby improving system performance and speed.

Digital video recorder with slot type mainboard

The present invention is related to a digital video recorder comprising a plurality of male slots, an image compression substrate including a plurality of channels, and a male-female connector connected to a lower surface of the image compression substrate and inserted into one of the plurality of male slots. A male connector may be arranged on a side surface of the male-female connector and may connect to a substrate female connector formed on the lower surface of the image compression substrate. A female connector may be arranged on another side surface of the male-female connector and may be inserted into the one of the plurality of male slots.

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Sungnam-si, South Korea

Jung-Jae Park