Patent ID: 11950085
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 19:
20. A method of generating a modified sound field description, the method comprising:
receiving a first sound field description related to a first reference location and receiving a second sound field description related to a further reference location being different from the first reference location and meta data relating to spatial information of the first sound field description or the second sound field description; and
calculating the modified sound field description using a translation information indicating a translation from the first reference location or the further reference location to a different reference location, wherein the calculating comprises:
to perform a source separation to the first sound field description to obtain a first group of one or more extracted objects and the second sound field description to obtain a second group of one or more extracted objects, to match the first group of extracted objects of the first sound field description and the second group of extracted objects of the second sound field description to obtain one or more matched objects, wherein one or more extracted objects that are different from the one or more matched objects are one or more non-matched objects, to estimate a position of a matched object of the one or more matched objects, and to modify the matched object of the one or more matched objects based on the estimated position of the matched object of the one or more matched objects and the different reference location, or
to perform a source separation on the first sound field description and on the second sound field description, to obtain extracted sources of the first sound field description and the second sound field description, to obtain direction of arrival (DoA) data for the extracted sources, to calculate, for each extracted source of the extracted sources, modified DoA data with respect to the different reference location using the DoA data and the translation information, and to process the extracted sources and the modified DoA data to obtain the modified sound field description, or
to match a first group of sources of the first sound field description and a second group of sources of the second sound field description to obtain one or more matched sources, to determine a direction of arrival information for each matched source of the one or more matched sources, to determine a distance of a source to the different reference location using the direction of arrival information and the meta data for the first sound field description or the second sound field description, and to determine a scaling factor using the distance of the source to the different reference location, or
to perform a sound analysis to the first sound field description to obtain a first group of one or more extracted objects or a direction of arrival information for one or more extracted objects and to the further second sound field description related to the further reference location to obtain a second group of one or more extracted objects or a direction of arrival information for one or more extracted objects using the meta data for the first sound field description or the second sound field description; to match the first group and the second group using object signals from the groups or direction of arrival information for objects from the groups to find at least one matched object; to calculate an estimated position of the matched object using the meta data for the first sound field description or the second sound field description and a first direction of arrival information obtained for the matched object by performing the sound analysis to obtain the first group and a second direction of arrival information obtained for the matched object by performing the sound analysis to obtain the second group; and to apply a distance compensation processing to the matched object based on the estimated position and the translation information, or
to perform a sound analysis to the first sound field description to obtain a first group of one or more extracted objects or a direction of arrival information for one or more extracted objects and to the second sound field description related to the further reference location to obtain a second group of one or more extracted objects or a direction of arrival information for one or more extracted objects using meta data for the first sound field description or the second sound field description; to match the first group and the second group using object signals from the groups or direction of arrival information for objects from the groups to find at least one matched object, and to select, for a calculation of a sound field description for the matched object related to the different reference location, either information related to the first sound field description or related to the second sound field description depending on a distance of the first reference location or the further reference location to a listener location determined by the translation information, or
to perform a sound analysis to the first sound field description to obtain a first group of one or more extracted objects or a direction of arrival information for one or more extracted objects and to the second sound field description related to the further reference location to obtain a second group of one or more extracted objects or a direction of arrival information for one or more extracted objects using meta data for the first sound field description or the second sound field description; to match the first group and the second group using object signals from the groups or direction of arrival information for objects from the groups to find at least one matched object, and to calculate, for each matched object, a new direction of arrival information using one of the direction of arrival information derived from the first sound field description and the second sound field description, or
to perform a sound analysis to the first sound field description to obtain a first group of one or more extracted objects or a direction of arrival information for one or more extracted objects and to the second sound field description related to the further reference location to obtain a second group of one or more extracted objects or a direction of arrival information for one or more extracted objects using meta data for the first sound field description or the second sound field description; to match the first group and the second group using object signals from the groups or direction of arrival information for objects from the groups to find at least one matched object, and to calculate a sound field description for each non-matched object from the first group using the direction of arrival information for the corresponding non-matched object from the first group and to calculate a sound field description for each non-matched object from the second group using the direction of arrival information for the corresponding non-matched object from the second group, or
to perform a sound analysis to the first sound field description to obtain a first group of one or more extracted objects or a direction of arrival information for one or more extracted objects and to the second sound field description related to the further reference location to obtain a second group of one or more extracted objects or a direction of arrival information for one or more extracted objects using meta data for the first sound field description or the second sound field description, to match the first group and the second group using object signals from the groups or direction of arrival information for objects from the groups to find at least one matched object, to determine an information on a diffuse signal for at least one of the first group and the second group, and to add the diffuse signal to a sound field description of a matched object of the at least one matched object or a sound field description of a non-matched object.