Apparatus and method for encoding and decoding of integrated speech and audio utilizing a band expander with a spectral band replication (SBR) to output the SBR to either time or transform domain encoding according to the input signal

A method for decoding an input signal executed by a computer, the method comprising:

• identifying a characteristic of the encoded input signal in a bitstream whether the encoded input signal has an audio characteristic or a speech characteristic;
• and
• decoding a core band of the encoded input signal using a first decoder based on a time-domain coding scheme, when the input signal has the speech characteristic;
• or
• decoding a core band of the encoded input signal using a second decoder based on a transform-coding scheme, when the input signal has the audio characteristic,
• wherein the encoded input signal is transmitted to the first decoder or the second decoder according to the characteristic of the input signal having the speech characteristic or the audio characteristic,
• wherein the core band is frequency band which is not to be expanded in the input signal.

A method for decoding an input signal executed by a computer, the method comprising:

• determining a characteristic of the encoded input signal in a bitstream whether the encoded input signal has an audio characteristic or a speech characteristic;
• decoding the encoded input signal by one of
• decoding a core band of the encoded input signal using a first decoder based on a time-domain coding scheme, when the input signal has the speech characteristic;
• or
• decoding a core band of the encoded input signal using a second decoder based on a transform-coding scheme, when the input signal has the audio characteristic,
• wherein the encoded input signal is provided to the first decoder or the second decoder according to the characteristic of the input signal having the speech characteristic or the audio characteristic,
• wherein the core band is low frequency band which is not to be expanded in the input signal.

An apparatus for decoding an input signal executed by a computer, the apparatus comprising:

• one or more processors configured to:
• identify a characteristic of an encoded input signal in a bitstream whether the encoded input signal has an audio characteristic or a speech characteristic;
• and
• decode a core band of the encoded input signal using a first decoder based on a time-domain coding scheme, when the input signal has the speech characteristic;
• or
• decode a core band of the encoded input signal using a second decoder based on a transform-coding scheme, when the input signal has the audio characteristic,
• wherein an encoded input signal is provided to the first decoder or the second decoder according to the characteristic of the input signal having the speech characteristic or the audio characteristic,
• wherein the core band is low frequency band which is not to be expanded in the input signal.