HARMONIC TRANSFORMATION BASED ON A BLOCK OF SUBRANGES AMPLIFIED BY CROSS PRODUCTS Russian patent published in 2019 - IPC G10L21/02 

Abstract RU 2694587 C1

FIELD: physics.

SUBSTANCE: invention relates to high-frequency reconstruction (HFR), amplified by cross products, where new component with frequency QΩ+rΩ0 is generated based on existing components with frequencies Ω and Ω+Ω0. Harmonic transformation is provided on the basis of unit of subranges, where time unit of complex-valued discrete values of subranges is processed by well-known modification of phases. Superposition of multiple modified discrete values yields the resultant effect of limiting undesirable cross products, making it possible to use coarser frequency resolution and/or lesser degree of oversampling. Hardware version of the invention includes an analysing filter unit (101), a subranges processing module (102) configured with control data (104) and a synthesizing filter unit (103).

EFFECT: reproducing the audio signal with high accuracy provided that the computational costs are reduced.

3 cl, 9 dwg

Similar patents RU2694587C1

Title Year Author Number
CROSS PRODUCT-ENHANCED, SUBBAND BLOCK-BASED HARMONIC TRANSPOSITION 2011
  • Villemoes Lars
RU2671619C2
HARMONIC CONVERSION BASED ON SUBBAND BLOCK, AMPLIFIED BY CROSS PRODUCTS 2023
  • Villemoes, Lars
RU2822612C1
HARMONIC TRANSFORMATION BASED ON A BLOCK OF SUB-BANDS ENHANCED BY CROSS PRODUCTS 2023
  • Villemoes, Lars
RU2801960C1
HARMONIC TRANSFORMATION BASED ON A BLOCK OF SUB-RANGES AMPLIFIED BY CROSS PRODUCTS 2019
  • Villemoes, Lars
RU2720495C1
HARMONIC TRANSFORMATION BASED ON BLOCK OF SUB-BANDS ENHANCED BY CROSS PRODUCTS 2023
  • Villemoes, Lars
RU2810281C1
CROSS PRODUCT-ENHANCED, SUBBAND BLOCK-BASED HARMONIC TRANSPOSITION 2018
  • Villemoes, Lars
RU2682340C1
CROSS PRODUCT-ENHANCED, SUBBAND BLOCK-BASED HARMONIC TRANSPOSITION 2019
  • Villemoes, Lars
RU2685993C1
HARMONIC TRANSFORMATION BASED ON A BLOCK OF SUB-BANDS ENHANCED BY CROSS PRODUCTS 2020
  • Villemoes, Lars
RU2796943C2
IMPROVED SUBBAND BLOCK BASED HARMONIC TRANSPOSITION 2014
  • Villemoes Lars
RU2644527C2
CROSS PRODUCT-ENHANCED, SUBBAND BLOCK-BASED HARMONIC TRANSPOSITION 2011
  • Villemoes Lars
RU2551817C2

RU 2 694 587 C1

Authors

Villemoes, Lars

Dates

2019-07-16Published

2019-03-25Filed