Method and apparatus for transmitting audio and non-audio information with error correction
First Claim
1. A method for wirelessly transmitting audio information, comprising the steps of:
- generating a digital bitstream representative of the audio information;
formatting the digital bitstream to comprise a plurality of data frames;
generating error correction bits associated with the respective frames, and embedding the error correction bits into the respective frames;
interleaving the data frames;
EFM encoding the bitstream to generate an EFM signal;
conditioning the EFM signal to generate a conditioned signal comprising sinusoid modulation tones; and
modulating a carrier signal using the conditioned EFM signal to thereby wirelessly transmit the audio information.
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Accused Products
Abstract
A method and an apparatus for providing digital quality transmission of audio and non-audio information using low cost components and arrangement. The present invention provides for the transmission of the audio and non-audio transmission by first converting the data to conform to the CD standard format and conditioning the converted signal to thereby generate a conditioned EFM signal. The conditioned EFM signal is used to frequency modulate a carrier. By converting the audio and non-audio information to conform to the CD standard format, the present method provides a low cost means of transmitting the data with error detection and correction. Another aspect of the present invention relates to embedding the non-audio information in the SUBCODE block of the data frame according to the CD standard. The non-audio information may be unrelated to the audio information, and the audio and non-audio information may be transmitted to separate devices. Another aspect of the present invention relates to controlling a voltage controlled oscillator in response to the fill level of a file buffer in the decoder.
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Citations
18 Claims
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1. A method for wirelessly transmitting audio information, comprising the steps of:
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generating a digital bitstream representative of the audio information; formatting the digital bitstream to comprise a plurality of data frames; generating error correction bits associated with the respective frames, and embedding the error correction bits into the respective frames; interleaving the data frames; EFM encoding the bitstream to generate an EFM signal; conditioning the EFM signal to generate a conditioned signal comprising sinusoid modulation tones; and modulating a carrier signal using the conditioned EFM signal to thereby wirelessly transmit the audio information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for receiving and processing audio information transmitted via a wireless channel, comprising the steps of:
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receiving an audio signal via the wireless channel; demodulating the received audio signal to recover a bandwidth limited EFM signal; decoding the EFM signal to generate a data bitstream comprising a plurality of data frames; deinterleaving the data in the data frames to generate a plurality of deinterleaved data frames; performing error correction in response to error correction codes included in the respective data frames; D/A converting the deinterleaved data frames to generate an analog output signal substantially free from transmission impairments. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification