Method and apparatus to simulate 2-channel virtualized sound for multi-channel sound

A stereo sound generation method of generating a 2-channel stereo sound from a 6.1-channel sound signal, the method comprising:

• generating a first channel stereo signal and a second channel stereo signal, by applying a difference between times taken to arrive at two ears of a listener, respectively, and a difference between sound pressures of the two ears that are different or constant in frequency to each of a first channel signal and a second channel signal being input;
• generating a first channel stereo signal and a second channel stereo signal, by applying the difference between times taken to arrive at the two ears, respectively, and the difference between the sound pressures of the two ears that are different or constant in frequency to each of a third channel signal and a fourth channel signal being input;
• generating a first channel signal and a second channel signal from each of fifth through seventh channel signals being input;
• generating a plurality of reflected sounds by applying delay values and gain values different from each other to first through sixth channel signals being input, and from the plurality of generated reflected sounds, generating a first channel signal and a second channel signal;
• and
• adding the generated first channel signals and adding the generated second channel signals,
• wherein at least one of the generating steps and the adding step are performed by a controller to generate the 2-channel stereo sound.

A stereo sound generation method of generating a 2-channel stereo sound from a 7.1-channel sound signal, the method comprising:

• generating a first channel stereo signal and a second channel stereo signal, by applying a difference between times taken to arrive at two ears of a listener, respectively, and a difference between sound pressures of the two ears that are different or constant in frequency to each of a first channel signal and a second channel signal being input;
• generating a first channel stereo signal and a second channel stereo signal, by applying the difference between times taken to arrive at the two ears, respectively, and the difference between the sound pressures of the two ears that are different or constant in frequency to each of a third channel signal and a fourth channel signal being input;
• generating a first channel stereo signal and a second channel stereo signal, by applying the difference between times taken to arrive at the two ears, respectively, and the different between the sound pressures of the two ears that are different or constant in frequency to each of a fifth channel signal and a sixth channel signal being input;
• generating a first channel signal and a second channel signal from each of a seventh channel signal and an eighth channel signal being input;
• generating a plurality of reflected sounds, by applying delay values and gain values different from each other to first through seventh channel signals being input, and from the plurality of generated reflected sounds, generating a first channel signal and a second channel signal;
• and
• adding the generated first channel signals and adding the generated second channel signals,
• wherein at least one of the generating steps and the adding step are performed by a controller to generate the 2-channel stereo sound.

A non-transitory recording medium containing a method of generating a 2-channel stereo sound from a 5.1-channel sound signal, the method comprising:

• generating a first channel stereo signal and a second channel stereo signal, by applying the difference between times taken to arrive at the two ears, respectively, and the difference between the sound pressures of the two ears that are different or constant in frequency, to each of a first channel signal and a second channel signal being input;
• generating a first channel stereo signal and a second channel stereo signal, by applying the difference between times taken to arrive at the two ears, respectively, and the difference between the sound pressures of the two ears that are different or constant in frequency, to each of a third channel signal and a fourth channel signal being input;
• generating a first channel signal and a second channel signal from each of a fifth channel signal and a sixth channel signal being input;
• generating a plurality of reflected sounds, by applying delay values and gain values different to each other to first through fifth channel signals being input, and from the plurality of generated reflected sounds, generating a first channel signal and a second channel signal;
• and
• adding the generated first channel signals and adding the generated second channel signals.

A non-transitory recording medium containing a method of generating a 2-channel stereo sound from a 6.1-channel sound signal, the method comprising:

• generating a first channel stereo signal and a second channel stereo signal, by applying the difference between times taken to arrive at the two ears, respectively, and the difference between the sound pressures of the two ears that are different or constant in frequency, to each of a first channel signal and a second channel signal being input;
• generating a first channel stereo signal and a second channel stereo signal, by applying the difference between times taken to arrive at the two ears, respectively, and the difference between the sound pressures of the two ears that are different or constant in frequency, to each of a third channel signal and a fourth channel signal being input;
• generating a first channel signal and a second channel signal from each of fifth through seventh channel signals being input;
• generating a plurality of reflected sounds, by applying delay values and gain values different to each other to first through sixth channel signals being input, and from the plurality of generated reflected sounds, generating a first channel signal and a second channel signal;
• and
• adding the generated first channel signals and adding the generated second channel signals.

A non-transitory recording medium containing a method of generating a 2-channel stereo sound from a 7.1-channel sound signal, the method comprising:

• generating a first channel stereo signal and a second channel stereo signal, by applying the difference between times taken to arrive at the two ears, respectively, and the difference between the sound pressures of the two ears that are different or constant in frequency, to each of a first channel signal and a second channel signal being input;
• generating a first channel stereo signal and a second channel stereo signal, by applying the difference between times taken to arrive at the two ears, respectively, and the difference between the sound pressures of the two ears that are different or constant in frequency, to each of a third channel signal and a fourth channel signal being input;
• generating a first channel stereo signal and a second channel stereo signal, by applying the difference between times taken to arrive at the two ears, respectively, and the different between the sound pressures of the two ears that are different or constant in frequency, to each of fifth channel signal and a sixth channel signal being input;
• generating a first channel signal and a second channel signal from each of a seventh channel signal and an eighth channel signal being input;
• generating a plurality of reflected sounds, by applying delay values and gain values different to each other to first through seventh channel signals being input, and from the plurality of generated reflected sounds, generating a first channel signal and a second channel signal;
• and
• adding the generated first channel signals and adding the generated second channel signals.