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:
Oct. 16, 1990
Filed:
Mar. 27, 1989
Virgil D Duncan, Raleigh, NC (US);
Digital Recorders, Inc., Research Triangle Park, NC (US);
Abstract
A multi-channel digital random access recorder-player receives an analog audio signal, converts the audio signal into a digital signal, and stores the digital signal in a memory for random access. The memory includes sixteen channels, each channel having sixteen memory boards, each channel and each memory board being assigned a unique four bit binary address by an address counter. An external control is provided by which the user selects an address for recording or playback and a comparator compares the selected address with the addresses of the memory. When the memory address corresponding to the selected address is detected, that memory board is enabled so that data can be recorded on the memory board or retrieved from the memory board for playback through an audio output device such as a loudspeaker. The recorder-player thereby provides random access to a memory. Also provided is a system in which several modules, each with a logic board and a memory, are combined into a single system.