Method and apparatus for converting an analog audio source into a digital format
First Claim
Patent Images
1. A method for detecting index tone in an existing analog audio signal as it is converted into a digital audio signal for a digital talking book, said method comprising the steps of:
- a) detecting a plurality of silence events in the digital audio signal as potential index tones;
b) measuring sample lengths of each of said potential index tones for detecting and removing an anomaly index tone from said potential index tones; and
c) associating said remaining potential index tones with pages and chapters of the digital talking book.
2 Assignments
0 Petitions
Accused Products
Abstract
An apparatus and method for converting and improving an existing analog audio recording as it is converted into a digital format with reliable tone detection and interpretation. Specifically, the digitized audio undergoes three tone detection processing steps: silence detection and removal, anomaly detection and removal and page/chapter identification.
21 Citations
20 Claims
-
1. A method for detecting index tone in an existing analog audio signal as it is converted into a digital audio signal for a digital talking book, said method comprising the steps of:
-
a) detecting a plurality of silence events in the digital audio signal as potential index tones;
b) measuring sample lengths of each of said potential index tones for detecting and removing an anomaly index tone from said potential index tones; and
c) associating said remaining potential index tones with pages and chapters of the digital talking book. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
d) applying adjustment to said digitized audio signal by applying pitch correction.
-
-
11. The method of claim 1, further comprising the step of:
d) applying adjustment to said digitized audio signal by removing low frequencies, and boosting high bass and upper midrange frequencies.
-
12. The method of claim 1, wherein said index tone detection steps (a-c) and said adjustment step d) are performed in parallel.
-
13. A computer-readable medium having stored thereon a plurality of instructions, the plurality of instructions including instructions which, when executed by a processor, cause the processor to perform the steps of a method for detecting index tone in an existing analog audio signal as it is converted into a digital audio signal for a digital talking book, comprising of:
-
a) detecting a plurality of silence events in the digital audio signal as potential index tones;
b) measuring sample lengths of each of said potential index tones for detecting and removing an anomaly index tone from said potential index tones; and
c) associating said remaining potential index tones with pages and chapters of the digital talking book. - View Dependent Claims (14, 15, 16, 17, 18, 19)
d) applying adjustment to said digitized audio signal by applying pitch correction.
-
-
19. The computer-readable medium of claim 13, further comprising the step of:
d) applying adjustment to said digitized audio signal by removing low frequencies, and boosting high bass and upper midrange frequencies.
-
20. An apparatus for detecting index tone in an existing analog audio signal as it is converted into a digital audio signal for a digital talking book, said apparatus comprising:
-
means for detecting a plurality of silence events in the digital audio signal as potential index tones;
means for measuring sample lengths of each of said potential index tones for detecting and removing an anomaly index tone from said potential index tones; and
means for associating said remaining potential index tones with pages and chapters of the digital talking book.
-
Specification