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46results about How to "Extend recording time" patented technology

Video recording device for a targetable weapon

A compact video image recording device which is mountable to a gun and useful for recording video images before and after the firing of the gun. The recording device includes a camera comprising a lens and a video image sensor. The video recording device is mounted on the gun such that the viewing area of the camera includes the target area of the gun. The video image sensor generates an electronic signal representative of a video image impinging the respective sensor. The output of the image sensor is processed and generally employed to produce frame data which are successively stored in successive frame locations of a semiconductor memory organized as a circular buffer memory while the video recording device is in an active state. Upon the firing of the gun, additional frames are stored in the buffer memory for a short period of time and a portion of the buffer memory is employed to preserve a video record of the shooting both before and after the event. Additional frames are successively stored in the unused portion of the buffer memory. In the event of a further firing of the gun, an additional portion of the buffer memory is dedicated to preserving the image data associated with subsequent firing incident. This process may be repeated until the buffer memory is full in the event the gun is repeatedly fired. A video record is thus generated which documents the circumstances preceding and following the firing of the gun.
Owner:MITSUBISHI ELECTRIC RES LAB INC

Digital interphone with sound recording function

The invention relates to a digital interphone with a sound recording function, wherein a radio frequency part consists of a transmitter, a receiver, a phase lock loop (PLL) and an antenna, a base band part consists of a high-performance processor ARM chip, a modulation demodulator, a flash memory and an audio processing chip, an audio part consists of an audio power amplification circuit, a microphone (MIC) and a loudspeaker, the modulation demodulator adopts a voice coding algorithm, the voice information is compressed to the speed rate being 2.4K, the ARM chip reads data stored in flashes according to selection, the voice is decoded through the modulation demodulator, the data is restored into voice, and digital signals are converted into analog signals through digital-to-analog (DA) conversation and are then output to the loudspeaker after being magnified through audio power amplification. The ARM chip reads data stored in the flashes, the data is transmitted out by the transmitter after the data coding regulation through the modulation demodulator, the voice coding algorithm is adopted, the occupied space of voice is effectively reduced, the recording time is prolonged, the voice quality is clear, the noise is low, the sound recoding content is displayed through the digital interphone, and can also be played and received by the interphone in a remote way.
Owner:TIANJIN 712 COMM & BROADCASTING CO LTD
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