The encoder and decoder functions
In terms of multimedia, encoder, mostly to analog audio signal compression coding data files, and decoder to data encoding files into analog audio signal process. , is a popular is used to encode, one is used to decode. Decoder, 译码器) , can is a kind of digital audio data stream decoded back into analog audio signal hardware/software equipment. Like mpeg4 video, audio mp3, ac3, DTS deposit these encoders can be raw data compression, but it also is the commonly used encoding formats, and some professional coding format, average household basic not used. In order to replay in household devices or computer video and audio decoding software you will need to use, generally called plug-ins. Such as mpeg4 decoding plugin ffdshow, ac3 decoding plug-in ac3fliter, etc. Only with various decoder plug-in on your computer can show the images and sounds. In terms of multimedia, encoder, mostly to analog audio signal compression coding data files, and decoder to data encoding files into analog audio signal process. Decoder classification as follows: according to the yuntai power supply voltage is divided into communication decoder and dc decoder. According to the communication methods are divided into one-way communication Shanghai decoder decoder and two-way communication. According to the communication signal transmission mode can be divided into coaxial transmission and twisted pair transmission. Decoder circuit based on single chip microcomputer as the core, by the power supply circuit, communication interface circuit, the introspection and the address input circuit, output driving circuit, alarm input interface circuit composition and so on. Yuntai decoder can control the up, down, left and right rotation, zoom zoom, focus, aperture, and the shield wipers, camera power supply, control of lighting equipment, can also provide a number of auxiliary switch function, to meet the actual needs of different users. High-grade decoder and cruise with preset functions. Absolute encoder output is more than a digital ( Gray code or pure binary code) And parallel output is more high and low level of output at the interface, to represent digital 1 or 0, for absolute encoder digits is not high, generally to directly form the output digital, can be directly into the PLC or PC's I/O interface, instant output, simple connection. Codec is the main function of the video signal compression and decompression. Codec compression ratio from general 2:1 ~ 100:1, make it possible to deal with a lot of video data. There is a difference between the three at the same time also have associated aspects. Shanghai electronic products is 27 years old, encoder manufacturers, is the encoder national industry standards unit, specializing in the production of various kinds of rotary encoder, the encoder model complete, can perfect replacement brand at home and abroad and encoder. Power factory, the factory has advanced production equipment and testing equipment, can be customized products perfect, can be customized according to customer's requirements type incremental encoder or absolute encoder, can customize the precision of the encoder, pulse, and the size of the encoder, looking for looking for electronic encoder manufacturers.