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:
Mar. 25, 2008
Filed:
Jan. 17, 2002
Jun Ishii, Hamamatsu, JP;
Takashi Tamaki, Hamamatsu, JP;
Jun Ishii, Hamamatsu, JP;
Takashi Tamaki, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
A nibble stream containing MIDI music data words and synchronous nibbles and an external audio signal are selectively converted to an audio-frequency signal, which in turn is converted to a set of PCM codes for storing it in a compact disc; and the audio frequency signal, which is demodulated from the PCM data codes, is analyzed to see which is the origin of the audio frequency signal on the basis of the signal level and what sort of modulation technique was employed on the basis of features of the audio frequency signal such as peak-to-peak intervals and similarity to reference waveforms so that the nibble stream or the external audio signal is exactly reproduced from the audio frequency signal.