Coding and decoding a transient frame

An electronic device for decoding a transient frame, comprising:

• a processor;
• memory in electronic communication with the processor;
• instructions stored in the memory, the instructions being executable to:
• obtain a frame type that indicates a current transient frame;
• obtain a transient coding mode parameter;
• determine whether to use a first transient coding mode or a second transient coding mode based on the transient coding mode parameter, the first transient coding mode being used for coding a transient frame detected during coding as being continuous with respect to a previous frame and the second transient coding mode being used for coding a transient frame detected during coding as having no continuity with the previous frame;
• and
• synthesize an excitation for the current transient frame based on (A) waveform interpolation in response to determining to use the first transient coding mode or (B) repeated placement of a prototype waveform in response to determining to use the second transient coding mode.

A method for coding a transient frame on an electronic device, comprising:

• obtaining a current transient frame;
• obtaining a residual signal based on the current transient frame;
• determining a set of peak locations based on the residual signal;
• determining whether to use a first transient coding mode or a second transient coding mode for coding the current transient frame based on at least the set of peak locations, comprising selecting the first transient coding mode for coding a transient frame detected as being continuous with respect to a previous frame or selecting the second transient coding mode for coding a transient frame detected as having no continuity with a previous frame;
• and
• synthesizing an excitation for the current transient frame based on (A) waveform interpolation in response to determining to use the first transient coding mode or (B) repeated placement of a prototype waveform in response to determining to use the second transient coding mode.

A method for decoding a transient frame on an electronic device, comprising:

• obtaining a frame type that indicates a current transient frame;
• obtaining a transient coding mode parameter;
• determining whether to use a first transient coding mode or a second transient coding mode based on the transient coding mode parameter, the first transient coding mode being used for coding a transient frame detected during coding as being continuous with respect to a previous frame and the second transient coding mode being used for coding a transient frame detected during coding as having no continuity with the previous frame;
• and
• synthesizing an excitation for the current transient frame based on (A) waveform interpolation in response to determining to use the first transient coding mode or (B) repeated placement of a prototype waveform in response to determining to use the second transient coding mode.

A computer-program product for coding a transient frame, comprising a non-transitory tangible computer-readable medium having instructions thereon, the instructions comprising:

• code for causing an electronic device to obtain a current transient frame;
• code for causing the electronic device to obtain a residual signal based on the current transient frame;
• code for causing the electronic device to determine a set of peak locations based on the residual signal;
• code for causing the electronic device to determine whether to use a first transient coding mode or a second transient coding mode for coding the current transient frame based on at least the set of peak locations, comprising selecting the first transient coding mode for coding a transient frame detected as being continuous with respect to a previous frame or selecting the second transient coding mode for coding a transient frame detected as having no continuity with a previous frame;
• and
• code for causing the electronic device to synthesize an excitation for the current transient frame based on (A) waveform interpolation in response to determining to use the first transient coding mode or (B) repeated placement of a prototype waveform in response to determining to use the second transient coding mode.

A computer-program product for decoding a transient frame, comprising a non-transitory tangible computer-readable medium having instructions thereon, the instructions comprising:

• code for causing an electronic device to obtain a frame type that indicates a current transient frame;
• code for causing the electronic device to obtain a transient coding mode parameter;
• code for causing the electronic device to determine whether to use a first transient coding mode or a second transient coding mode based on the transient coding mode parameter, the first transient coding mode being used for coding a transient frame detected during coding as being continuous with respect to a previous frame and the second transient coding mode being used for coding a transient frame detected during coding as having no continuity with the previous frame;
• and
• code for causing the electronic device to synthesize an excitation for the current transient frame based on (A) waveform interpolation in response to determining to use the first transient coding mode or (B) repeated placement of a prototype waveform in response to determining to use the second transient coding mode.

An apparatus for coding a transient frame, comprising:

• means for obtaining a current transient frame;
• means for obtaining a residual signal based on the current transient frame;
• means for determining a set of peak locations based on the residual signal;
• means for determining whether to use a first transient coding mode or a second transient coding mode for coding the current transient frame based on at least the set of peak locations, comprising selecting the first transient coding mode for coding a transient frame detected as being continuous with respect to a previous frame or selecting the second transient coding mode for coding a transient frame detected as having no continuity with a previous frame;
• and
• means for synthesizing an excitation for the current transient frame based on (A) waveform interpolation in response to determining to use the first transient coding mode or (B) repeated placement of a prototype waveform in response to determining to use the second transient coding mode.

An apparatus for decoding a transient frame, comprising:

• means for obtaining a frame type that indicates a current transient frame;
• means for obtaining a transient coding mode parameter;
• means for determining whether to use a first transient coding mode or a second transient coding mode based on the transient coding mode parameter, the first transient coding mode being used for coding a transient frame detected during coding as being continuous with respect to a previous frame and the second transient coding mode being used for coding a transient frame detected during coding as having no continuity with the previous frame;
• and
• means for synthesizing an excitation for the current transient frame based on (A) waveform interpolation in response to determining to use the first transient coding mode or (B) repeated placement of a prototype waveform in response to determining to use the second transient coding mode.