Patent ID: 11924628
Assignee: HEAR360 INC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A virtual surround sound process for loudspeaker systems comprising:
inputting a standard stereo audio source signal with a left information and a right information into a virtualization process;
extracting center image information from the stereo sound-source signal;
subtracting low frequency information from the extracted center image information and routing the result to a center (C) audio path;
Mid-Side decode processing the extracted center image information with a low pass filter to extract mid and high frequency information and routing the result to a left and a right output path;
routing the Mid-Side decode processing output to the “Left (L)” and “Right (R)” output paths;
processing the mid side decode processing output with a high pass filter to remove low frequency information, splitting the output thereof to a left side and a right side, processing the left side by an audio delay block to provide a delay, and routing the delayed left side and right side to a left surround rear (LSR) and a right surround rear (RSR) output;
summing the left information and right information to create a single mono audio source,
processing the single mono audio source with a Low Pass filter to remove middle and high frequency information, and then routing to a “Low Frequency Effects (LFE)” output path;
all output paths L, R, C, LSR, RSR, and LFE are now available to be routed to individual speakers or channel processing paths.