Audio coding based on tables with bank additional filters to suppress spurious signals aliasing within the limits of the pictures.

摘要

A method for signal processing comprising: receiving an input signal (201) comprising a sequence of frames (20 26), comprising a picture signal input respective one sequence of blocks (11 17) of samples signal which includes a boot block (11), one or more intermediate blocks (12 16) and an end block (17), representing said intervals overlapping blocks of audio information, wherein: said boot block is a first segment followed by a second segment followed by a third segment, and said end block consists of a first segment followed by a second segment followed by a third segment, generating, in response to said box input signal respective first block filtered signal by applying to said start block a first analysis filterbank (205) that provides for cancellation of sawteeth in the time domain, one or more seconds the signal filtered by applying to said one or more interim blocks a second set of analysis filters (206) that provides the means for canceling sawtooth in the time domain, and a third signal block filtering by applying thereby to said end block a third set of analysis filters (207) that provides for cancellation of sawteeth in the time domain, wherein: said second signal blocks filtrates have spurious production teeth saw, said first signal block filter has spurious signals producing sawtooth audio information in the second segment of the start block that provide means for the cancellation of sawteeth in a second signal block filtering that It represents the interval of audio information that overlaps the second segment of the start block and has substantially no signals esp urias production teeth Sierrade audio information in the first segment of the boot block, and said third signal block filter has spurious signals producing sawtooth audio information in the second segment of the end block produce the cancellation of spurious signals producing sawtooth in a second block of the filtered signal representing the interval of audio information that overlaps the second segment of the end block and has substantially no spurious signals producing teeth saw audio information in the third segment of the end block, and generating an output signal (230) suitable for transmission or storage, assembling for that said first block of the filtered signal, such one or more second blocks of the filtered signal, and said third signal block filtering a signal box respective output, which is generated is quence of frames the output signal for joining them first, second and third filtered signal blocks generated in response to said plurality of frames of the input signal.