Method and apparatus for transitioning between sequences of digital information

• US 5,359,712 A
• Filed: 02/21/1992
• Issued: 10/25/1994
• Est. Priority Date: 05/06/1991
• Status: Expired due to Term

• Current Assignee: Apple Inc.
• Original Assignee: Apple Computer Incorporated (Apple Inc.)
• Inventors: Mills, Michael, Cohen, Jonathan R.
• Primary Examiner(s): Nguyen, Phu K.
• Application Number:
  US07/839,620
• Time in Patent Office: 977 Days
• Field of Search: 395/133, 395/155, 395/161, 395/135, 395/138, 345/121, 345/122, 358/185, 358/214, 358/215, 358/216
• US Class Current: 715/723
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/038 Cross-faders therefor
• CPC Class Codes: G11B 27/34 Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D
• CPC Class Codes: H04N 5/262 Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
• CPC Class Codes: Y10S 715/978 Audio interaction as part of an operator interface

Abstract

A method and apparatus for generating and observing a transition between a first and second sequence of information. The invention is practiced on a computer controlled display system and a computer controlled sound generation system. The method includes providing the first stream and the second stream of information to the computer system; creating a template for modifying an audio signal during a transition from the first stream of information to the second stream of information; specifying the duration of the transition and specifying at least a portion of the first stream and a portion of the second stream for the transition; creating an audio transition using the audio template for modifying an audio signal and using the portion of the first stream and the portion of second stream. Another aspect of the invention includes a method for controlling the rate of transistion from the first stream of digital information to the second stream of digital information which method includes: providing the first stream of information and second stream of information to the computer system; providing a rate transition template for specifying the rate of transition during the transistion; specifying the duration of the transistion and at least a portion of the first stream and the second stream for the transition; creating the transition using the rate template and the portions of the first and second streams, wherein the rate transition template includes a visual representation of the rate of transition over the duration of the transition.

Claims

1. In a computer controlled display system, a method for transitioning between a first stream of digital audio information and a second stream of digital audio information, said method comprising the steps of:

providing said first stream and said second stream to said computer system;

creating a means for modifying an audio signal during a transition from said first stream to said second stream said audio signal generated from at least one of said first stream and said second stream;

specifying the duration of said transition and at least a portion of said first and said second streams for said transition;

creating an audio transition using said means for modifying an audio signal and said portion of said first and said second streams.

2. A method as in claim 1 further comprising storing said first and said second streams and wherein said means for modifying an audio signal provides a first envelope for processing an audio signal to provide a first modification and a second envelope for processing an audio signal to provide a second modification and further comprising selecting one of said first and second envelopes according to a desired modification.

3. A method as in claim 2 further comprising providing a representation having at least one of a visual representation and an auditory representation and a temporal representation of said first envelope and said second envelope in a transition control window on a display coupled to said computer system and wherein said selecting step comprises positioning a cursor on said display over said one of said first and second envelope to select the modification desired.

4. A method as in claim 1 further comprising playing said audio transition and wherein said means for modifying an audio signal is an audio template which provides instructions for processing an audio signal and wherein said step of creating an audio transition comprises determining for each sample in said portion of said first stream a first resultant value based on said audio template and determining for each sample in said portion of said second stream a second resultant value based on said audio template and combining the resultant values for said portion of said first and said portion of said second stream of each sample.

5. A computer controlled display system for creating a transition between a first stream of digital audio information and a second stream of digital audio information, said system comprising:

a first storage means for storing said first stream and said second stream;

a second storage means for storing transition information specifying how to combine at least a portion of said first stream and at least a portion of said second stream for each transition;

a processing means for combining said portion of said first stream and said portion of said second stream according to said transition information, said processing means being coupled to said first and said second storage means;

a sound generation means to produce the sounds of the combination of said portion of said first stream and said portion of said second stream, said sound generation means being coupled to said processing means.

6. An apparatus as in claim 5 further comprising a means for specifying the duration of said transition, said means for specifying being coupled to said processing means, said second storage means storing transition information for a first modification to a first audio signal generated from said first stream and storing transition information for a second modification to a second audio signal generated from said second stream and further comprising a means for selecting one of said transition information for a first modification and said transition information for a second modification, said means for selecting being coupled to said processing means.

7. An apparatus as in claim 6 further comprising a display means coupled to said computer system, and wherein at least one of a visual representation and an auditory representation and a temporal representation of said first modification and at least one of a visual representation and an auditory representation and a temporal representation of said second modification are provided and wherein said means for selecting is used to select the desired modification by positioning a cursor on said display over said one of said first modification and said second modification.

8. An apparatus as in claim 7 wherein said processing means determines for each sample in said portion of said first stream a resultant value based on said desired modification and determines for each sample in said portion of second stream a resultant value based on said desired modification and combines the resultant values for said portion of said first and said portion of said second stream.

9. In a computer controlled display system, a method for controlling a rate of transition between a first sequence of digital information and a second sequence of digital information, said method comprising:

providing said first sequence and said second sequence to said computer system;

providing a rate transition control means for specifying said rate of transition during said transition;

specifying a duration of said transition and at least a portion of said first and said second sequences for said transition;

creating said transition using said rate transition control means and said portions of said first and said second sequences, wherein said rate transition control means includes a visual representation of said rate of transition over said duration of said transition.

10. A method as in claim 9 wherein a plurality of rate transition control means are provided, each of said plurality specifying a different rate of transition during said transition and further comprising selecting one of said plurality of rate transition control means to control the rate of said transition.

11. A method as in claim 10 wherein each of said rate transition control means includes a visual representation of the rate of transition during the duration of a transition controlled by said each of said rate transition control means and wherein at least some of said visual plurality of rate transition control means are displayed on a display device coupled to said computer system and said selecting step comprises positioning a cursor over the visual representation of the desired rate transition control means and signalling to said computer system to select said desired rate transition control means.

12. A method as in claim 10 wherein said first and said second sequence comprises digital audio information.

13. A method as in claim 10 wherein said first and said second sequence comprises digital video information for images.

14. A method as in claim 10 wherein said first sequence comprises digital audio information and/or digital video information for images and said second sequence comprises digital audio information and/or digital video information for images.

15. A method as in claim 10 further comprising providing a transition template for specifying the transition between said first sequence and said second sequence and wherein each of said rate transition control means includes a graphical description of said each of said rate transition control means, and wherein said transition is created by, for each sample in said first sequence and said second sequence, mapping the position of said each sample in the respective sequence to a position on said graphical descriptive of the selected rate transition control means to determine a corresponding position on said transition template.

16. A computer controlled display system for controlling a rate of transition between a first sequence of digital information and a second sequence of digital information, said system comprising:

a first storage means for storing said first and said second sequence;

a second storage means for storing rate transition control information for specifying said rate of transition during said transition, said rate transition control information including a visual representation of said rate of transition over a duration of said transition;

a means for specifying said duration of said transition and at least a portion of said first and said second sequences for said transition;

a processing means for combining at least said portions of said first sequence and said second sequence according to said rate transition control information, said processing means being coupled to said first and said second storage means and being coupled to said means for specifying said duration.

17. An apparatus as in claim 16 further comprising a transition template means for specifying the transition.

18. In a computer controlled display system, a method for controlling a rate of transition between a first sequence of digital information and a second sequence of digital information, said method comprising:

providing said first sequence and said second sequence to said computer system;

providing a rate transition control template for specifying said rate of transition during said transition;

specifying a duration of said transition and at least a portion of said first and said second sequences for said transition;

creating said transition using said rate transition control template and said portions of said first and said second sequences, wherein said rate transition control template includes a visual representation of said rate of transition over said duration of said transition.