Method and system for presenting a multimedia stream

A system for presenting a multimedia stream including a set of audio streams, wherein the set of audio streams comprise a first audio stream and a second audio stream having different content from the first audio stream, the system comprising one or more processors configured to execute machine-readable instructions stored in a memory to cause the system to perform:

• receiving the first audio stream, wherein the first audio stream comprises a set of first audio slices sequentially located in the first audio stream, wherein each first audio slice comprises a timestamp and a grade value;
• receiving the second audio stream, wherein the second audio stream comprises a set of second audio slices sequentially located in the second stream, wherein each of the second audio slices is aligned in time with one of the first audio slices;
• presenting the first audio stream according to the timestamp of the first set of first audio slices;
• receiving a set of control commands, wherein the set of control commands comprises a first threshold value;
• determining whether the first threshold value is lower than the grade value of the first audio slice;
• and
• in response to the determination that the first threshold value is lower than the grade value of the first audio slice, presenting the second audio slice aligned with the first audio slice.

A method for processing an audio stream, the method comprising:

• receiving the audio stream, wherein the audio stream comprises a set of first audio slices sequentially located in the audio stream, wherein each first audio slice comprises a timestamp;
• performing automatic speech recognition, based on the timestamp, on the first audio slice to generate a first text data;
• processing the first text data to obtain a feature vector;
• determining a feature score for characterizing the first audio slice based on the feature vector;
• determining that the feature score is greater than a predetermined threshold;
• and
• updating the audio stream by replacing the first audio slice with a second audio slice having different content from the first audio slice.