Reproducing apparatus
AssigneeSony Corporation
InventorsKohei Kanou, Minako Ishizuka, Takahiro Sato, Masayuki Mizuki
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Abstract
In a reproducing apparatus of the present invention, an input audio signal is divided into bands and an envelope value of each band is measured. Based on a change of the envelope value, a predetermined sound source is superimposed. Further, according to the envelope value of a reproduced audio signal, a tempo of reproduced music is detected and animation representation is changed in synchronism with the detected tempo. Further, a rhythm box is reproduced in synchronism with the detected tempo and a sound field is automatically selected corresponding to the detected tempo to perform synthesization.
Claims14
A reproducing apparatus comprising:
- a band dividing means for dividing an input audio signal to a plurality of bands;
- an envelope detecting means for detecting an envelope value at every band divided by said band dividing means;
- a first memory means for holding an envelope value detected by said envelope detecting means at every band;
- a second memory means for holding the envelope value stored in said first memory means by shift in time series at every band;
- an operation means for calculating a difference value between a present envelope value stored in said first memory means and a previous envelope value stored in said second memory means;
- an image memory means for storing a plurality of display patterns;
- a display means for displaying a display pattern read out from said image memory means;
- and
- an image memory control means for switching a display pattern generated from said image memory means based on a difference value calculated by said operation means.
A reproducing apparatus comprising:
- a band dividing means for dividing an input audio signal to a plurality of bands;
- an envelope detecting means for detecting an envelope value at every band divided by said band dividing means;
- a first memory means for holding an envelope value detected by said envelope detecting means at every band;
- a second memory means for holding the envelope value stored in said first memory means by shift in time series at every band;
- an operation means for calculating a difference value between a present envelope value stored in said first memory means and a previous envelope value stored in said second memory means at every band;
- a tempo measuring means for measuring a tempo based on a difference value calculated by said operation means;
- a rhythm sound source generating means for generating plural kinds of rhythm patterns;
- a synthesizing means for synthesizing said input audio signal with a rhythm pattern generated by said rhythm sound source generating means;
- and
- a rhythm sound source generation control means for synchronizing a rhythm sound source generated from said rhythm sound source generating means with said input audio signal based on a tempo information from said tempo measuring means.
A reproducing apparatus comprising:
- a band dividing means for dividing an input audio signal to a plurality of bands;
- an envelope detecting means for detecting an envelope value at every band divided by said band dividing means;
- a first memory means for holding an envelope value detected by said envelope detecting means at every band;
- a second memory means for holding the envelope value stored in said first memory means by shift in time series at every band;
- an operation means for calculating a difference value between a present envelope value stored in said first memory means and a previous envelope value stored in said second memory means;
- a tempo measuring means for measuring a tempo based on a difference value calculated by said operation means;
- a cyclic property detecting means for detecting a cyclic property of an audio signal input based on a difference value calculated by said operation means;
- and
- a melody determining means for determining a melody of the input audio signal based on both cyclic property information detected by said cyclic property detecting means and tempo information measured by said tempo measuring means.
Dependencies are inferred from the claim text.