EP0283727A2
Expired / Lapsed
EP
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Method and apparatus for producing an audio magnetic tape recording at high speed from a preselected music libray
Assignee: 1K MUSIC INTERNATIONAL Ltd
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Filing: 1988-02-19
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Granted: —
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Expires: 2008-02-19
Abstract
Abstract The present invention relates to a novel method and apparatus for taking an analog audio signal, converting the signal into a digital audio signal, and thereafter converting the digital audio signal into a standard bandwidth video signal and thereby substantially compressing it. In this format, it can be placed onto a master video tape from which it can be transferred to a video disk. The present invention further comprises a method and apparatus from which a selected number of recordings on the video disk can be retrieved by playing the video disc in still frame mode to create an analog video signal, converting the analog video signal into a string of digital values, converting the digital audio stream into an analog audio signal and thereafter recording the audio signal onto an audio tape at high speed. This method and apparatus is used as the central technology in a consumer electronic music center wherein a consumer can randomly select a given number of song selected from a music library and thereafter create his or her own customized audio tape in a matter of minutes.
Inventors
- 👤 Lorne A. Parker
- 👤 Steven R. Hanrahan
- 👤 Julian Kleiner
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 00:49
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/10527; G09; G09B; G09B5/00; G09B5/04; G11B20/00007; G11B27/00; G11B27/002; G11B27/02; G11B27/031; G11B27/032; G11B27/10; G11B27/34; G11B5/00; G11B5/86; H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/802; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2537; G11B2220/2587; G11B2220/40; G11B2220/41; G11B2220/90; G11B27/022; G11B27/024; G11B27/034
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
78 words
A method of compressing an audio signal comprising: a. supplying an analog audio signal; b. filtering said analog audio signal to prevent aliasing; c. converting said analog audio signal to a digital audio signal; d. storing said digital audio signal on a signal storage means; and e. removing said digital audio signal from said mass storage means and converting said digital audio signal into a standard bandwidth video signal thereby converting the signal into a compressed audio signal.
Claim 2
Independent Claim
78 words
A method of compressing an audio signal comprising: a. supplying an analog audio signal; b. filtering said analog audio signal to prevent aliasing; c. converting said analog audio signal to a digital audio signal; d. storing said digital audio signal on a signal storage means; and e. removing said digital audio signal from said mass storage means and converting said digital audio signal into a standard bandwidth video signal thereby converting the signal into a compressed audio signal.
Claim 3
Dependent Claim
221 words
The method as defined in Claim 1 comprising the further steps of: a. filtering the compressed audio signal to remove high frequency components which were introduced into the reconstructed analog signal during the digital to analog conversion process; b. recording said compressed audio signal onto a videotape recorder to create a master video tape; c. creating a video laser disc from said master video tape; d. playing a particular frame from the video laser disc in still frame mode to create an analog video signal; e. converting said analog video signal into a string of digital values; f. sending the string of digital values through a buffer means to control the output data transfer rate of the digitzed compressed audio and to take up any gaps in the digital data stream caused during the frame grabbing process; g. converting the digital audio stream into an analog audio signal; h. controlling the data transfer rate during the time a digital signal is sent through the buffer means and during conversion of the digital signal into an analog audio signal and creating a time delay between the two steps to permit the data bits to stabilize prior to leaving the buffer means; i. filtering the analog audio signal to remove high frequency components; and j. recording said analog audio signal onto audio tape.
Claim 4
Independent Claim
90 words
An apparatus for compressing an audio signal comprising: a. means for supplying an analog audio signal; b. means for filtering said analog audio signal to prevent aliasing; c. means for converting said analog audio signal to a digital audio signal; d. means for storing said digital audio signal on a mass signal storage means; and e. means for removing said digital audio signal from said mass signal storage means and converting said digital audio signal into a standard bandwidth video signal thereby converting the signal into a compressed audio signal.
Claim 5
Independent Claim
90 words
An apparatus for compressing an audio signal comprising: a. means for supplying an analog audio signal; b. means for filtering said analog audio signal to prevent aliasing; c. means for converting said analog audio signal to a digital audio signal; d. means for storing said digital audio signal on a mass signal storage means; and e. means for removing said digital audio signal from said mass signal storage means and converting said digital audio signal into a standard bandwidth video signal thereby converting the signal into a compressed audio signal.
Claim 6
Dependent Claim
169 words
The apparatus as defined in Claim 3 further comprising: a. means for filtering the compressed audio signal to remove high frequency components which were introduced into the reconstructed analog signal during the digital to analog conversion process; b. means for recording said compressed audio signal onto a videotape recorder to create a master video tape; c. means for creating a video laser disc from said master video tape; d. means for creating an audio cassette tape from said video laser disc further comprising: i. means for playing a particular frame from the video laser disc in still frame mode to create an analog video signal; ii. means for converting said analog video signal into a string of digital values; iii. first in first out buffer means for controlling the output data transfer rate of the digitized compressed audio and for taking up any gaps in the digital data stream caused during the frame grabbing process; and iv. means for converting the digital audio stream into an analog audio signal.
Claim 7
Dependent Claim
102 words
The apparatus as defined in Claim 4 further comprising: a. output clock means for controlling the data transfer rate during the time a digital signal is sent through said first in first out buffer means and also through said means for converting the digital stream into an analog audio signal to thereby create a time delay between the two means to permit the data bits to stabilize prior to leaving the first in first out buffer means; b. means for filtering the analog audio signal to remove high frequency components; and c. means for recording said analog audio signal onto audio tape;
Claim 8
Independent Claim
99 words
An apparatus for producing an audio magnetic tape recording at high speed from a preselected music library comprising: a. a user interface means to permit a user to select which songs the user wishes to record; b. a compressed audio signal means which stores said music library in compressed analog video signal form; and c. an audio decompression high speed duplication means which can retrieve a selected number of songs from said music library, convert said analog video signal into a decompressed analog audio signal and record the decompressed analog audio signal at high speed onto an audio tape.
Claim 9
Independent Claim
99 words
An apparatus for producing an audio magnetic tape recording at high speed from a preselected music library comprising: a. a user interface means to permit a user to select which songs the user wishes to record; b. a compressed audio signal means which stores said music library in compressed analog video signal form; and c. an audio decompression high speed duplication means which can retrieve a selected number of songs from said music library, convert said analog video signal into a decompressed analog audio signal and record the decompressed analog audio signal at high speed onto an audio tape.
Claim 10
Dependent Claim
218 words
The apparatus as defined in Claim 6 wherein: a. said user interface means further comprises: i. a central processing unit means; ii. a video monitor means; iii. a video adapter means for interconnecting said video monitor means with said central processing unit means; iv. a keypad means; v. a keypad interface means for interconnecting said keypad means to said central processing unit means; b. said compressed audio signal means is a video disc onto which has been recorded a multiplicity of audio songs which have been converted from their original analog audio signal into a digital audio signal and thereafter converted into a standard bandwidth video signal and thereby compressed onto a video tape from which they are transferred onto the video disc; c. said audio decompression high speed duplication means further comprises: i. means for playing a particular frame from the video disc in still frame mode to create an analog video signal; ii. means for converting said analog video signal into a string of digital values; iii. first in first out buffer means for controlling the output data transfer rate of the digitized compressed audio and for taking up any gaps in the digital data stream caused during the frame grabbing process; and iv. means for converting the digital audio stream into an analog audio signal.
Claim 11
Dependent Claim
122 words
The apparatus as defined in Claim 7 further comprising: a. printer means; b. printer interface means for interconnecting said printer means with said central processing unit means; c. output clock means for controlling the data transfer rate during the time the digital audio signal is sent through said first in first out buffer means and also through said means for converting the digital audio stream into an analog audio signal to thereby create a time delay between the two means to permit the data bits to stabilize prior to leaving the first in first out buffer means; d. means for filtering the analog audio signal to remove high frequency components; and e. means for recording said analog audio signal onto audio tape.
Claim 12
Dependent Claim
218 words
The apparatus as defined in Claim 7 where said audio decompression high speed duplication means further comprises: a. a multiplicity of means for playing a particular frame from the video disc in still frame mode to create an analog video signal; b. a multiplicity of means for converting said analog video signal into a string of digital values wherein each such means is connected to a selected one of the multiplicity of means for playing a particular frame from the video disc; c. a de-multiplexer circuit means for selecting a given one of said multiplicity of means for playing a particular frame from the video disc and for selecting a given song from said video disc; d. a multiplicity of first in first out buffer means for controlling the output data transfer rate of the digitized compressed audio and for taking up any gaps in the digital data stream caused during the frame grabbing process wherein each such means is connected to a selected one of the multiplicity of means for converting said analog signal into a string of digital values; and e. a multiplicity of means for converting the digital audio stream into an analog audio signal wherein each such means is connected to a selected one of the multiplicity of first in first out buffer means.
Claim 13
Dependent Claim
142 words
The apparatus as defined in Claim 9 further comprising: a. output clock means for controlling the data transfer rate during the time the digital audio signal is sent through a given one of said first in first out buffer means and also through a given one of said means for converting the digital audio stream into an analog audio signal to thereby create a time delay between the two means to permit the data bits to stabilize prior to leaving the selected first in first out buffer means; b. a multiplicity of means for filtering the analog audio signal to remove high frequency components wherein each such means is connected to a selected one of the multiplicity of means for converting the digital audio stream into an analog audio signal; and c. means for recording said analog audio signal onto audio tape.
References Cited (Backward Citations)
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