STEREO ENCODER AND AUDIO SIGNAL DECODER Russian patent published in 2019 - IPC G10L19/02 G10L19/08 G10L25/06 H04S1/00 

Abstract RU 2690885 C1

FIELD: physics.

SUBSTANCE: invention relates to means for stereo encoding and decoding of audio signals. First signal and the second signal are received. Recovery parameters of high frequencies are accepted. Said downmix signal is extended to a frequency range above the second division frequency by performing a high frequency recovery using high-frequency recovery parameters. Parameters of the up-mix are accepted. First and second signals are mixed to generate the left and right channels of the stereo signal. Moreover, for frequencies below the first division frequency, the mixing comprises performing an inverse sum-difference transformation of the first and second signals, and for frequencies above the first division frequency, the mixing comprises performing parametric upmixing of said downmix signal using upmixing parameters.

EFFECT: technical result consists in improvement of the efficiency of frequency band use.

16 cl, 6 dwg

Similar patents RU2690885C1

Title Year Author Number
STEREO AUDIO CODER AND DECODER 2019
  • Purnhagen, Heiko
  • Kjoerling, Kristofer
RU2798009C2
STEREOPHONIC CODER AND DECODER OF AUDIO SIGNALS 2014
  • Purnkhagen Khejko
  • Cherling Kristofer
RU2665214C1
STEREOPHONIC CODE AND DECODER OF AUDIO SIGNALS 2014
  • Purnkhagen, Khejko
  • Cherling, Kristofer
RU2645271C2
AUDIO UPMIX DEVICE CONFIGURED TO OPERATE IN PREDICTION MODE OR IN MODE WITHOUT PREDICTION 2019
  • Carlsson, Pontus
  • Purnhagen, Heiko
  • Villemoes, Lars
RU2717387C1
STEREOPHONIC COMPATIBLE MULTICHANNEL SOUND ENCODING 2005
  • Purnkhagen Khejko
  • Brebart Jeroen
  • Skhejers Ehrik
  • Villemoes Lars
  • Reden Jonas
  • Ehngdegard Jonas
RU2381570C2
PARAMETRIC STEREOPHONIC UPMIX APPARATUS, PARAMETRIC STEREOPHONIC DECODER, PARAMETRIC STEREOPHONIC DOWNMIX APPARATUS, PARAMETRIC STEREOPHONIC ENCODER 2009
  • Skhejers Ehrik G. P.
RU2497204C2
AUDIO UPMIXING DEVICE WITH THE POSSIBILITY OF OPERATING IN THE MODE WITH/WITHOUT PREDICTION 2020
  • Carlsson, Pontus
  • Purnhagen, Heiko
  • Villemoes, Lars
RU2799737C2
MDCT-BASED COMPLEX PREDICTION STEREO CODING 2011
  • Carlsson Pontus
  • Purnhagen Heiko
  • Villemoes Lars
RU2559899C2
STEREOPHONIC CODING BASED ON MDCT WITH COMPLEX PREDICTION 2011
  • Carlsson Pontus
  • Purnhagen Heiko
  • Villemoes Lars
RU2683175C2
STEREOPHONIC CODING BASED ON MDCT WITH COMPLEX PREDICTION 2019
  • Carlsson Pontus
  • Purnhagen Heiko
  • Villemoes Lars
RU2698154C1

RU 2 690 885 C1

Authors

Purnhagen, Heiko

Kjoerling, Kristofer

Dates

2019-06-06Published

2018-07-27Filed