Signal processing device and audio playback device having the same

Abstract

The invention relates to a device for processing a digital audio signal and an audio playback device having such a device. It is an object of the invention to enable a signal processing device having an automatic sound field correction function to output a test signal and a picked-up sound signal without adding a special interface. The signal processing device having an automatic sound field correction function includes: a digital formatting section for converting a signal pair of a test signal and a picked-up sound signal for an automatic sound field correction operation into a bit stream format; and a selecting section for selectively supplying either a bit stream generated by the digital formatting section or an audio bit stream to an existing interface. The selecting section selects the bit stream of the signal pair of the test signal and the picked-up sound signal during trial manufacturing, repairing, maintenance, and the like.

Description

technical field [0001] The present invention relates to signal processing devices, in particular to devices for processing digital audio signals and audio reproduction devices comprising such devices. Background technique [0002] Currently, 5.1-channel formats such as Dolby Digital (registered trademark), DTS (registered trademark), and AAC (Advanced Audio Codec) are widely used as audio compression methods. Furthermore, it can be predicted that audio compression methods such as Dolby Digital Plus (registered trademark), Dolby TrueHD (registered trademark), and DTS-HD (registered trademark) corresponding to 7.1 channels will be popularized in the future. In these multi-channel audio systems, the sound of each channel can be output from a plurality of speakers arranged around the listener, so that the audience can enjoy the effect as if they were in a real scene. [0003] In a multi-channel audio system, it is best to arrange the speakers at equal distances from the audienc...

AI Technical Summary

Problems solved by technology

However, when the delay of the internal circuit is too large, the test signal cannot be detected within the measurement time, or the level of the sound collection signal is not appropriate, or the influence of noise is too great, causing the automatic correction function to not work as expected , it is necessary to use special hardware and software to take out the signal from the internal circuit and analyze it

Although it is easy to debug if there is an interface for outputting internal signals, it is disadvantageous in terms of cost to provide an output terminal dedicated to debugging

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