The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 1995
Filed:
Oct. 08, 1993
Dan D Carman, Russiaville, IN (US);
Delco Electronics Corporation, Kokomo, IN (US);
Abstract
Varying the selection and play of tracks on a CD in non-sequential order includes a CD mechanism (12) with which a processor (16) communicates, a keyboard (17) having a shuffle play key (18) for user actuation, and a disc and track display (19). The processor (16) generates a shuffled selection offset (T.sub.n) from a deterministic function based upon a sequence number (S.sub.n) and a random seed (Seed). The deterministic function includes performance of plurality of binary operations which may include bit inversions, exclusive OR with an N-bit constant, N-bit rotations, bit swapping, one to one substitutions, and modulus additions and subtractions. The generated sequence plays all selections before any selection is repeated, allows the user to replay any past selection or skip to any unplayed selection while maintaining the same order, requires minimal memory and execution time, and is suitable for use with single-disc CD players and multi-disc CD changers.