| 摘要 |
The invention relates to a method and apparatus for recognizing a digital audio signal (1, 6) in a system, in which at least some of the electronic components (3, 4, 5) are at times in sleep or unenergized mode, in which method the digital audio signal (1, 31) is amplified and recognized, the amplified signal is decoded in a decoding circuit (4), the decoded signal is led to a signal processor (5) for further processing and digital/analog conversion, and an audio signal (11) is created from the analog signal. According to the invention, the amplified, undecoded signal (6) is led directly to the signal- or microprocessor (5) to be used and recognized, and the circuit (4) implementing the decoder is kept in sleep mode unless a digital audio signal (1, 31) has been recognized. |
