DEVICE AND METHOD FOR FORMING A SIGNAL WITH AN ADVANCED PASS BAND FROM AN AUDIO SIGNAL WITH A LIMITED PASS BAND

摘要

1. The device (100) for generating a signal (135) with an expanded bandwidth from an audio signal (105) with a limited bandwidth, the audio signal (105) with a limited bandwidth contains many sequential time blocks (511) with a limited bandwidth, while each limited bandwidth time block has at least one associated bandwidth replication parameter (121) containing the base frequency band, and the extended bandwidth signal (135) contains a plurality of incremental time blocks (513) with an extended bandwidth, the device (100) comprising: a patch generation module (110) for generating a patched signal (115) containing a high frequency band using a time block with a limited audio signal bandwidth (105) with a limited bandwidth; - while the patch generation module (110) is configured to implement a harmonic patch algorithm (515) in order to obtain a patched signal (115); - the whose is configured to implement a harmonic patching algorithm (515) for the current time block (m ') with an expanded bandwidth from a plurality of consecutive time blocks (513) with an expanded bandwidth using the previously limited time band time block (m-1) transmitting from a plurality of consecutive time blocks (511) with a limited bandwidth of an audio signal (105) with a limited bandwidth; - a signal processing module (120) for signal processing (105) before pat ation or patched signal (115)