Stereo audio signal encoder
AssigneeNokia Corporation
InventorsAdriana VASILACHE, Lasse Juhani LAAKSONEN, Anssi Sakari RAMO
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Abstract
An apparatus comprising: a channel analyser configured to determine at least one set of parameters defining a difference between at least two audio signal channels; a value analyser configured to analyse the at least one set of parameters to determine an initial trend; a mapper configured to map instances of the at least one set of parameters according to a first mapping to generate mapped instances with associated order position instances based on the initial trend; and an encoder configured to encode the mapped instances based on the order position of the mapped instances.
Claims25
1-37. (canceled)
A method comprising:
- determining at least one set of parameters defining a difference between at least two audio signal channels;
- analysing the at least one set of parameters to determine an initial trend;
- mapping instances of the at least one set of parameters according to a first mapping to generate mapped instances with associated order position instances based on the initial trend;
- and
- encoding the mapped instances based on the order position of the mapped instances.
A method comprising:
- decoding from a first part of a signal a parameter instance and from a second part a parameter trend indicator;
- and
- mapping the parameter instance dependent on the parameter trend indicator to generate a demapped parameter instance, wherein the mapping is dependent on the parameter trend indicator.
An apparatus comprising at least one processor and at least one memory including computer code for one or more programs, the at least one memory and the computer code configured to with the at least one processor cause the apparatus to at least:
- determine at least one set of parameters defining a difference between at least two audio signal channels;
- analyse the at least one set of parameters to determine an initial trend;
- map instances of the at least one set of parameters according to a first mapping to generate mapped instances with associated order position instances based on the initial trend;
- and
- encode the mapped instances based on the order position of the mapped instances.
An apparatus comprising at least one processor and at least one memory including computer code for one or more programs, the at least one memory and the computer code configured to with the at least one processor cause the apparatus to at least:
- decode from a first part of a signal a parameter instance and from a second part a parameter trend indicator;
- and
- map the parameter instance dependent on the parameter trend indicator to generate a demapped parameter instance, wherein the mapping is dependent on the parameter trend indicator.
Dependencies are inferred from the claim text.