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US 7,248,934 B1Granted
Method of transmitting a one-dimensional signal using a two-dimensional analog medium
AssigneeCreative Technology Ltd
InventorsDavid Rossum, Mark Dolson, Jean LaRoche, Wong Hoo Sim
Life of this patent
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Abstract
A method and apparatus for printing a one-dimensional, continuous signal, such as a sound wave, as a printed pattern and for recovering the sound wave from the printed pattern. The method decomposes the one dimensional signal two-dimensional function that is continuous in both dimensions. The two-dimensional function can be printed as a pattern on to a paper substrate using a standard printer. The audio signal is recovered by scanning the pattern and processing the scanned values.
Claims20
An audio/visual recording structure comprising:
- a paper substrate;
- a photographic image printed on said substrate;
- and
- a sound strip, printed on said substrate, comprising a pattern of printed dots arrayed in two dimensions, with intensity of the dots-representing the magnitude of a substantially continuous two dimensional mathematical function which is the decomposition of a one dimensional audio signal, with a pattern element printed at a coordinate pair representing specific values of the two dimensions, and with each pattern element including a plurality of printed dots having an intensity of one of a range of at least three intensities representing a value of the two-dimensional function at values of the coordinate pair.
1 more element
A method for transmitting audio/voice utilizing a sound strip, the method comprising:
- receiving a one dimensional audio signal that is substantially continuous in time;
- mathematically decomposing, using a digital computer, the audio signal into a two-dimensional function of time and frequency having a substantially continuous value in both dimensions;
- printing the two-dimensional function as a pattern on a paper substrate, with a pattern element printed at a coordinate pair representing specific values of the two dimensions, and with each pattern element including a plurality of printed dots having an intensity of one of a range of at least three intensities representing a value of the two-dimensional function at values of the coordinate pair;
- scanning the pattern to obtain a scanned signal;
- and
- processing the scanned signal, using a digital computer, to recover the one dimensional audio signal.
3 more elements
A method for generating an audio signal, the method comprising:
- scanning a substantially continuous two-dimensional function printed as a pattern on a paper substrate, with each pattern element printed at a coordinate pair representing specific values of the two dimensions and each pattern element including a plurality of printed dots having an intensity of one of a range of at least three intensities representing a value of the two-dimensional function at values of the coordinate pair, to obtain an array of values indicating the magnitude of the intensity of the printed dots in said pattern;
- processing the array of values to obtain values of the two-dimensional function at said coordinate pairs;
- processing said values to determine the audio signal as a one-dimensional function of time;
- and
- converting the audio signal to sound to reproduce the audio signal transmitted as the two-dimensional pattern.
2 more elements
An apparatus for generating an audio signal, the apparatus comprising:
- a substantially elongated body having a proximate and distal end;
- a scanner, positioned at the proximate end of said housing, that generates an array of values indicating the intensity of a printed pattern of dots arrayed in two dimensions, with intensity of the dots representing the magnitude of a substantially continuous two-dimensional mathematical function which is the decomposition of a one-dimensional audio signal, with a pattern element printed at a coordinate pair representing specific values of the two dimensions, and with each pattern element including a plurality of printed dots having an intensity of one of a range of at least three intensities representing a value of the two-dimensional function at values of the coordinate pair;
- a digital processor, supported by said body and coupled to said scanner to receive said array, programmed to process said array to recover and output the audio signal;
- an amplifier, supported by said body and coupled to the digital processor to receive the audio signal, that amplifies the audio signal and outputs an amplified audio signal;
- and
- a loudspeaker, supported by said housing and coupled to receive said amplified audio signal, for converting the amplified audio signal to sound.
3 more elements
A method for transmitting audio/voice utilizing a sound strip, the method comprising:
- receiving a one-dimensional audio signal that is substantially continuous in time;
- mathematically decomposing, using a digital computer, the audio signal into a substantially continuous two-dimensional function of time and frequency having a substantially continuous magnitude in both dimensions;
- printing the two-dimensional function as a pattern on a paper substrate, with a pattern element printed at a coordinate pair representing specific values of the two dimensions, and with each pattern element including at least one printed dot having an intensity of one of a range of at least three intensities representing a value of the two-dimensional function at values of the coordinate pair;
- scanning the pattern to obtain a scanned signal;
- and
- processing the scanned signal, using a digital computer, to recover the one dimensional audio signal.
3 more elements
A method for generating an audio signal, the method comprising:
- scanning a substantially continuous two-dimensional function printed as a pattern on a paper substrate, with each pattern element printed at a coordinate pair representing specific values of the two dimensions and each pattern element including at least one printed dot having an intensity of one of a range of at least three intensities representing a value of the two-dimensional function at values of the coordinate pair, to obtain an array of values indicating the magnitude of the intensity of the printed dots in said pattern;
- processing the array of values to obtain values of the two-dimensional function at said coordinate pairs;
- processing said values to determine the audio signal as a one-dimensional function of time;
- and
- converting the audio signal to sound to reproduce the audio signal transmitted as the two-dimensional pattern.
2 more elements
A method for transmitting a one dimensional audio signal that is substantially continuous in time, said method comprising:
- mathematically decomposing, using a digital computer, the audio signal into a substantially continuous, two-dimensional function of time and frequency having a substantially continuous magnitude in both dimensions;
- printing the two-dimensional function as a pattern on a paper substrate, with a pattern element printed at a coordinate pair representing specific values of the two dimensions, and with each pattern element including a plurality of printed dots having an intensity of one of a range of at least three intensities representing a value of the substantially continuous, two-dimensional function at values of the coordinate pair;
- scanning the pattern on the paper to obtain an array of values indicating the magnitude of the intensity of the printed patterns;
- processing the array of values to obtain recovered values of the substantially continuous, two-dimensional function at said coordinate pairs;
- and
- processing said recovered values to determine reconstructed values of a one dimensional function of time representing the audio signal.
3 more elements
A method for transmitting a one-dimensional audio signal that is substantially continuous in time, said method comprising:
- mathematically decomposing, using a digital computer, the audio signal into a substantially continuous, two-dimensional function of time and frequency having a substantially continuous magnitude in both dimensions;
- printing the two-dimensional function as a pattern on a paper substrate, with a pattern element printed at a coordinate pair representing specific values of the two dimensions and with each pattern element including at least one printed dot having an intensity of one of a range of at least three intensities representing a value of the substantially continuous, two-dimensional function at values of the coordinate pair;
- scanning the pattern on the paper to obtain an array of values indicating the magnitude of the intensity of the printed patterns;
- processing the array of values to obtain recovered values of the substantially continuous, two-dimensional function at said coordinate pairs;
- and
- processing said recovered values to determine reconstructed values of a one dimensional function of time representing the audio signal.
3 more elements
A method for transmitting audio/voice utilizing a sound strip, the method comprising:
- receiving a one-dimensional audio signal that is substantially continuous in time;
- mathematically decomposing, using a digital computer, the audio signal into a two-dimensional function of time and frequency having a substantially continuous value in both dimensions;
- printing the two-dimensional function as a pattern on a paper substrate, with a pattern element printed at a coordinate pair representing specific values of the two dimensions and with each pattern element including a plurality of printed dots having an intensity interpolated between values at adjacent coordinate pairs and wherein the intensity is one of a range of at least three intensities;
- scanning the pattern to obtain a scanned signal;
- and
- processing the scanned signal, using a digital computer, to recover the one-dimensional audio signal.
3 more elements
Dependencies are inferred from the claim text.