What signals are collected by digital cameras?

The camera outputs digital signals. Cameras can be divided into two categories: digital cameras and analog cameras. A digital camera can convert the analog video signal generated by the video capture device into a digital signal, and then store it in the computer. The video signal captured by the analog camera must be converted into a digital signal through a specific video capture card and compressed before it can be converted to a computer for use.

Digital cameras refer to cameras whose image processing and signal recording are all completed using digital signals. The biggest feature of this kind of camera is that the signal recorded on the tape is a digital signal, not an analog signal. After the image signal captured by the digital camera is converted into an electrical signal by the CCD, it is immediately digitized by the circuit. All subsequent processing before recording to the tape is digital processing, and finally the processed digital signal is recorded directly onto the tape.

Good image quality: The use of digital signals can ignore the impact of noise introduced by the circuit part. At the same time, due to the characteristics of digital recording, the background noise of the tape has almost no impact on the playback image signal, so the playback image is clear and clean with excellent quality.

Error correction coding is used during the recording process, so that the signal loss of the tape during playback can be effectively compensated and the picture loss is less.

High recording density and small machine size. Digital recording can effectively reduce the width of the recording track and increase the recording density of the tape. The MiniDV tape used by standard cameras is only the size of a matchbox, but it can record 60 minutes of content at the standard SP tape speed. When LP slow recording Can record for 90 minutes (using DVM60 tape). The reduction in the size of the magnetic tape resulted in a corresponding reduction in the size of the machine, resulting in a true "palm pocket" camera smaller than the palm of your hand.

High reliability: The high consistency of digital circuits and the low sensitivity of digital signals to circuit performance dispersion make the circuit parts that use mechanical means to adjust almost zero in digital cameras, greatly improving the reliability of the machine. properties, extending the service life of the machine.

Low cost of use: Since the tape tension of digital cameras is very small, only a few grams, the wear on the magnetic head and tape is correspondingly reduced, and the service life of the magnetic drum, one of the most expensive components, is greatly extended. Maintenance costs are reduced accordingly, thereby reducing usage costs.

Perfect recording sound quality: The audio part of the digital camera is recorded to tape using digital PCM, which has extremely high fidelity. When recording at 16 bits, the sound quality can reach the quality of a CD master.