Browsing by Author "Sundvall, Mika"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Akustisen kitaran näppäyskohdan arvioiminen nauhoitetusta äänestä
    (2012-12-04) Sundvall, Mika
     Sähkötekniikan korkeakoulu | Bachelor's thesis
  • Opus Audio Codec in Mobile Networks
    (2014-12-15) Sundvall, Mika
     Sähkötekniikan korkeakoulu | Master's thesis
    The latest generations in mobile networks have enabled a possibility to include high quality audio coding in data transmission. On the other hand, an on-going effort to move the audio signal processing from dedicated hardware to data centers with generalized hardware introduces a challenge of providing enough computational power needed by the virtualized network elements. This thesis evaluates the usage of a modern hybrid audio codec called Opus in a virtualized network element. It is performed by integrating the codec, testing it for functionality and performance on a general purpose processor, as well as evaluating the performance in comparison to the digital signal processor's performance. Functional testing showed that the codec was integrated successfully and bit compliance with the Opus standard was met. The performance results showed that although the digital signal processor computes the encoder's algorithms with less clock cycles, related to the processor's whole capacity the general purpose processor performs more efficiently due to higher clock frequency. For the decoder this was even clearer, when the generic hardware spends on average less clock cycles for performing the algorithms.