Device for processing realistic sub-band signal of multiple realistic sub-band signals, has weigher for weighing sub-band signal with weighing factor that is specified for sub-band signal around subband-signal to hold weight

: Edler, B.; Popp, H.

Abstract
(B3) Zum Verarbeiten eines Subband-Signals einer Mehrzahl von reellen Subband-Signalen, die eine durch eine Analyse-Filterbank erzeugte Darstellung eines reellen zeitdiskreten Signals sind, wird ein Gewichter zum Gewichten eines Subband-Signals mit einem für das Subband-Signal bestimmten Gewichtungsfaktor vorgesehen, um ein gewichtetes Subband-Signal zu erhalten. Ferner wird durch einen Korrekturterm-Bestimmer ein Korrekturterm berechnet, wobei der Korrekturterm-Bestimmer ausgebildet ist, um den Korrekturterm unter Verwendung wenigstens eines weiteren Subband-Signals und unter Verwendung eines weiteren Gewichtungsfaktors, der für das weitere Subband-Signal vorgesehen ist, zu berechnen, wobei sich die beiden Gewichtungsfaktoren unterscheiden. Der Korrekturterm wird dann mit dem gewichteten Subband-Signal kombiniert, um ein korrigiertes Subband-Signal zu erhalten, das zu einem reduzierten Aliasing führt, selbst wenn Subband-Signale unterschiedlich stark gewichtetwerden.

 

DE 102006047197 B3 UPAB: 20080306 NOVELTY - The device has a weigher (10) for weighing sub-band signal with a weighing factor (C-k) that is specified for the sub-band signal around a subband-signal (11) to hold a weight. A corrected determinator (12) is provided for calculating a correction term. The correction term determinator calculates the correction term under application of another sub-band signal (X-l) and under application of another weighing factor (C-l), which is provided for the other sub-band signal. The other weighing factor is different from weighing factor and a combiner (13) for combining the weighted sub-band signal. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a method for processing a real sub-band signal (2) an analysis filter bank has a mechanism for producing multiple sub-band signals from a time-discrete signal (3) a synthesis filter bank (4) a method for filtering a time-discrete signal (5) a methodfor synthesizing a signal (6) a computer program has a program code for execution of the method. USE - Device for processing a realistic sub-band signal of multiple realistic sub-band signals, particularly audio or video signals, which are the representation of realistic time discrete signals that are produced by an analysis filter bank. ADVANTAGE - The corrected determinator is provided for calculating a correction term. The correction term determinator calculates the correction term under application of another sub-band signal and under application of another weighing factor, which is provided for the other sub-band signal. The other weighing factor is different from weighing factor and a combiner for combining the weighted sub-band signal, and thus ensures an efficient and highly qualitative processing of signals.