Surround channel and intermediate channel signal generation device using digital two channel stereo signal

摘要

The present invention relates to a device suitable for generating a surround channel and an intermediate channel signal using only a pure 2-channel signal. Conventionally, a 4-channel signal is input to generate a 2-channel signal, However, in the present invention, a two-channel stereo signal is used to sum the signals, and then the signals are summed up in the spectrum calculator 3, the mode determiner 4 determines delayed components, Components are filtered by the low-pass filter unit 6, and the left and right channel signals and the filtered signal are decoded into analog signals and amplified and output as four signals, so that the structure of the receiving end is simplified.