Testing loops for channel codecs
AssigneeNokia Corporation
InventorBerthier Lemieux
Life of this patent
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Abstract
A method for measuring the performance of decoding in a telecommunication system comprising a decoder and a testing apparatus for supplying test data to the decoder. A test data comprising channel coded speech parameters and an inband data field in a frame format is generated in the testing apparatus and transmitted to the decoder for decoding. The decoder extracts at least a part of the inband data field from the decoded test data and transmits at least the part of the inband data field back to the testing apparatus. The performance of decoding is measured by comparing the transmitted inband data field and the received inband data field in the test apparatus.
Claims13
A method for determining the performance of decoding in a telecommunication system comprising a decoder and a testing apparatus for supplying test data to the decoder, the method comprising steps of
- generating test data comprising channel coded parameters and inband data,
- transmitting the test data from the testing apparatus to the decoder for decoding,
- extracting at least a part of the inband data from the decoded test data,
- transmitting at least the part of the inband data back to the testing apparatus, and
- determining the performance of decoding by comparing the transmitted inband data and the received inband data in the test apparatus.
A testing apparatus for determining the performance of a decoder, which testing apparatus is arranged to be functionally connected to the decoder, the testing apparatus comprising
- a composing means for composing test data comprising channel coded parameters and inband data,
- a transmitter for transmitting the test data to the decoder for decoding,
- a receiver for receiving at least part of the inband data, and
- a comparator for determining the performance of decoding by comparing the transmitted inband data and the received inband data.
A mobile station, comprising
- a receiver for receiving test data comprising channel coded parameters and inband data from a testing apparatus,
- a decoder for decoding the test data,
- extracting means for extracting at least part of the inband data from the decoded test data, and
- a transmitter for transmitting at least a part of the inband data back to the testing apparatus.
Dependencies are inferred from the claim text.