Appeal No. 2001-1346 Page 2
Application No. 08/771,469
portions of audio data that might not be perceived by an end user. (Spec. at 2.)
Component audio, in contrast, retains all portions of a digital audio signal. (Id.)
While waveform editors exist for linear encoded, digital audio signals, the
appellant asserts that no graphical tools exist for directly editing perceptually encoded
audio data or component audio data. (Id.) Consequently, he explains, such audio data
must first be decoded to conventional high resolution audio for editing. (Id. at 2-3.) The
edited audio data must be then be encoded. (Id. at 3.)
In contrast, the appellant's invention provides a graphical interface for editing
perceptually encoded audio data or component audio data. (Id.) More specifically, the
invention comprises a receiver for receiving an encoded audio signal having a plurality
of frequency subbands. Control logic generates a spectral graph of the encoded audio
signal, the graph including an amplitude of each frequency subband as a function of
time. The control logic also allows a user to mark at least one selectable edit point of
the encoded audio signal via an input device. A display unit presents the spectral graph
including the marked edit point. (Id.)
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