N kinds of analog sound fields of DSP sound field processing technology

[Audio Network Information] "DSP" is called "Digital Sound Field Processing". It is a new sound field processing system developed and produced by Yamaha Corporation of Japan in the 1980s. The so-called sound field processing technology is to process the sound wave reflection and reverberation signals of the singing and playing scenes in various occasions to form different sound field characteristic data, and package them in a large-scale integrated circuit (DSP), when replaying Through the DSP circuit, the data of the corresponding simulated sound field is called up, and the effects of various scenes can be more conveniently simulated. Therefore, in the signal that already has Dolby directional logic decoding, adding the live signal of the DSP will create a more beautiful sound field.

The DSP software is divided into two types, the field features and the surround feature. The former is used to process the dialogue and background music of the character, and the latter is used to generate the surround sound effect. Currently DSP software generally has the functions of these two kinds of software.

On AV amplifiers with DSP sound field processing, they are generally marked with "NATURALSOUNDDIGITALSOUNDFIELDPROCESSING".

At present, there are two main types of DSP sound field processing circuits. The more commonly used is the "serial processing method", that is, the left, center, right and surround sound signals generated by the Dolby decoder processing, only the surround sound signal enters the DSP processing system, and the surround sound processed by the DSP can be generated. The effects of various simulated sound fields. The other is the "serial control mode", that is, the two DSP systems respectively process the left, middle and right sound field signals and the surround sound signals, so that the front and back sound fields generated by the simulation are mutually extended, thereby generating a complete simulated sound field, which is heavy. The effect of the discharge is better than the "serial processing method", but the circuit is more complicated.

DSP sound field processing techniques generally produce the following analog sound fields:

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Hall Cin Europe: European Concert Hall C (1700 seats)

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