Signal processing apparatus

Abstract

A signal processing apparatus which is capable of reducing the occurrence of noise at editing points without the need to decode an encoded audio signal when editing the encoded audio signal. A recording / reproduction section reproduces an audio signal sequence including an audio signal encoded according to normalization information for controlling amplitude of the audio signal, and the normalization information. A normalization information converter changes the normalization information of the reproduced audio signal sequence. At least one of a first normalization information corresponding to a first encoded audio signal of a first audio signal sequence as the reproduced audio signal sequence and a second normalization information corresponding to a second encoded audio signal of a second audio signal sequence as the reproduced audio signal sequence are changed by the normalization information converter, such that the value of the first normalization information and the value of the second normalization information become equal.

Description

technical field [0001] The present invention relates to signal processing devices, in particular to signal processing devices performing processing of encoded audio signals. Background technique [0002] Conventionally, there are digital video cameras capable of encoding audio signals in units of audio frames composed of a plurality of audio samples, and multiplexing the encoded audio signals and encoded video signals. In the case of a digital video camera having an editing function for editing a shot scene, editing is performed in frame units of moving images or in group units of multiple frames of moving images (for example, refer to Japanese Patent Application Laid-Open No. 2000-175139 . ) [0003] However, in the above-mentioned prior art, because the editing is carried out based on the frame of the moving picture, it is generally necessary to decode the sound signal once and re-encode the sound signal after editing for an audio signal that is not synchronized with the ...

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Problems solved by technology

[0003] However, in the above-mentioned prior art, because the editing is carried out based on the frame of the moving picture, it is generally necessary to decode the sound signal once and re-encode the sound signal after editing for an audio signal that is not synchronized with the frame of the moving picture. deal with

In addition, in the above-mentioned conventional technology, in order to suppress the deterioration of the sound quality and to reduce the processing amount of the audio signal, the audio signal is also edited in units of audio frames as encoding units, but since no special editing is performed on the amplitude value of the audio signal, Because of the processing of the control, there is a problem that an abnormal sound occurs at the edit point (the connection part of two different scenes)

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