Audio signal encoder
AssigneeNokia Technologies Oy
InventorsAnssi Sakari Ramo, Adriana Vasilache, Lasse Juhani Laaksonen
Life of this patent
Estimating the term…
Abstract
An apparatus comprising: a parameter determiner configured to determine for a frame of at least one audio signal a set of frame audio signal multi-channel parameters; a parameter selector configured to select for the frame a sub-set of the set of frame audio signal multi-channel parameters based on an error value associated with the sub-set of the set of frame audio signal multi-channel parameters; and parameter encoder configured to generate an encoded frame audio signal multi-channel parameter based on the selected sub-set of the set of frame audio signal multi-channel parameters.
Claims27
1-23. (canceled)
A method comprising:
- determining for a frame of at least one audio signal a set of frame audio signal multi-channel parameters;
- selecting for the frame of the at least one audio signal a sub-set of the set of frame audio signal multi-channel parameters based on an error value associated with the sub-set of the set of frame audio signal multi-channel parameters;
- and
- generating an encoded frame audio signal multi-channel parameter based on the selected sub-set of the set of frame audio signal multi-channel parameters.
A method comprising:
- receiving within a period an encoded audio signal comprising at least one frame downmix audio signal and at least one multi-channel audio signal parameter signal comprising a sub-set of a set of frame audio signal multi-channel parameters;
- recovering any elements of the set of frame audio signal multi-channel parameters not present in the sub-set of the set of frame audio signal multi-channel parameters;
- and
- generating a frame of at least two audio channels of at least one audio signal from the at least one frame downmix audio signal, and a combination of the sub-set of the set of frame audio signal multi-channel parameters and recovered elements of the set of frame audio signal multi-channel parameters not present in the sub-set of the set of frame audio signal multi-channel parameters.
An apparatus comprising at least one processor and at least one memory including computer program code for one or more programs, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:
- determine for a frame of at least one audio signal a set of frame audio signal multi-channel parameters;
- select for the frame of the at least one audio signal a sub-set of the set of frame audio signal multi-channel parameters based on an error value associated with the sub-set of the set of frame audio signal multi-channel parameters;
- and
- generate an encoded frame audio signal multi-channel parameter based on the selected sub-set of the set of frame audio signal multi-channel parameters.
An apparatus comprising at least one processor and at least one memory including computer program code for one or more programs, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:
- receive within a period an encoded audio signal comprising at least one frame downmix audio signal and at least one multi-channel audio signal parameter signal comprising a sub-set of a set of frame audio signal multi-channel parameters;
- recover any elements of the set of frame audio signal multi-channel parameters not present in the sub-set of the set of frame audio signal multi-channel parameters;
- and
- generate a frame of at least two audio channels of at least one audio signal from the at least one frame downmix audio signal, and a combination of the sub-set of the set of frame audio signal multi-channel parameters and recovered elements of the set of frame audio signal multi-channel parameters not present in the sub-set of the set of frame audio signal multi-channel parameters.
Dependencies are inferred from the claim text.