Time-domain superwideband bandwidth expansion for cross-talk scenarios

A device for time-domain bandwidth expansion of an excitation signal during decoding of a cross-talk sound signal, comprising:

• at least one processor;
• and
• a memory coupled to the processor and storing non-transitory instructions that when executed cause the processor to implement:
• a decoder of a high-band mixing factor received in a bitstream, wherein the decoder of the high-band mixing factor decodes a quantized normalized gain received in the bitstream and calculates the high-band mixing factor using the decoded quantized normalized gain;
• and
• a mixer of a low-band excitation signal and a random noise excitation signal using the high-band mixing factor to produce the time-domain bandwidth expanded excitation signal.

A device for time-domain bandwidth expansion of an excitation signal during encoding of a cross-talk sound signal, comprising:

• at least one processor;
• and
• a memory coupled to the processor and storing non-transitory instructions that when executed cause the processor to implement:
• a calculator of a high-band mixing factor usable for mixing a low-band excitation signal and a random noise excitation signal to produce the time-domain bandwidth expanded excitation signal;
• wherein the calculator of the high-band mixing factor is configured to calculate and quantize a gain from which the high-band mixing factor is obtained.

A device for time-domain bandwidth expansion of an excitation signal during decoding of a cross-talk sound signal, comprising:

• at least one processor;
• and
• a memory coupled to the processor and storing non-transitory instructions that when executed cause the processor to:
• decode a high-band mixing factor received in a bitstream, comprising decoding a quantized normalized gain received in the bitstream and calculating the high-band mixing factor using the decoded quantized normalized gain;
• and
• mix a low-band excitation signal and a random noise excitation signal using the high-band mixing factor to produce the time-domain bandwidth expanded excitation signal.

A device for time-domain bandwidth expansion of an excitation signal during encoding of a cross-talk sound signal, comprising:

• at least one processor;
• and
• a memory coupled to the processor and storing non-transitory instructions that when executed cause the processor to:
• calculate a high-band mixing factor usable for mixing a low-band excitation signal and a random noise excitation signal to produce the time-domain bandwidth expanded excitation signal;
• wherein, to calculate the high-band mixing factor, the processor calculates and quantizes a gain from which the high-band mixing factor is obtained.