Method and apparatus of wireless audio playback system
First Claim
1. An apparatus of audio playback system, comprising:
- an audio source which generates the output data stream of the original audio sampled;
an audio compression device for reducing the amount of audio data;
a wireless transmission device transferring the compressed audio data through the air media;
a wireless receiving device receiving the compressed audio data through the air media;
an audio decompression device for recovering the audio data stream; and
an audio playback system which plays the audio stream.
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Abstract
Audio compression/decompression codec is applied to reduce the data rate during wireless transmission and receiving resulting in higher efficiency of transmission bandwidth which allows scheduled time to turn on and shut off the transmission and receiving devices. The average values of a predetermined amount of audio samples within a pack of audio are inserted into the compressed audio data as references in recovering the audio data. When small amount of audio data are lost during transmission, some recovered audio samples are repeated to represent the lost data within a pack of audio data. Should the variance of a certain amount of data samples are high, some un-compressed audio data will be packed and sent out to maintain the audio quality.
39 Citations
16 Claims
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1. An apparatus of audio playback system, comprising:
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an audio source which generates the output data stream of the original audio sampled;
an audio compression device for reducing the amount of audio data;
a wireless transmission device transferring the compressed audio data through the air media;
a wireless receiving device receiving the compressed audio data through the air media;
an audio decompression device for recovering the audio data stream; and
an audio playback system which plays the audio stream. - View Dependent Claims (2, 3, 4, 5)
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6. A method of audio data playback through wireless data transmission, comprising:
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synchronizing the compressed audio data flowing of wireless transmission and receiving;
turning on and off the wireless transmission device and receiving device according to the predetermined time schedule;
turning on and off the audio compression engine according to the predetermined time schedule; and
turning on and off the audio decompression engine according to the predetermined time schedule;
- View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A method of error correction in audio data playback through wireless data transmission, comprising:
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receiving the compressed audio data through a wireless receiver;
checking the amount of the compressed audio data to determine whether audio data loss happened or not;
if data loss happened, taking a procedure from the following error correction mechanisms;
requesting the transmission device to re-send the lost pack of audio data;
orrepeating at least one of the recovered audio sample to represent the lost audio data within a pack of audio;
orrepeating the last audio sample of previous pack of audio if the length of pack of audio data is shorter than a predetermined amount of audio samples;
ortaking the inserted average values as references to recover the targeted lost audio samples;
ortaking the inserted average values to represent the targeted lost audio samples;
- View Dependent Claims (15, 16)
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Specification