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Author:Törnqvist, Mikko
Title:X.264 videokoodekin toteutus korkean tason synteesillä
High-Level Synthesis and Implementation of the X.26 Video Codec
Publication type:Master's thesis
Publication year:2011
Pages:x + 71 s. + liitt. 13      Language:   fin
Department/School:Mikro- ja nanotekniikan laitos
Main subject:Piiritekniikka   (S-87)
Supervisor:Halonen, Kari
Instructor:Koskinen, Lauri
Electronic version URL: http://urn.fi/URN:NBN:fi:aalto-201207022676
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
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Location:P1 Ark Aalto  1526   | Archive
Keywords:video encoding
X.264
videokoodaus
MPEG-4
VHDL
Catapult
Abstract (eng): The design process of digital circuits is becoming increasingly complex.
Designing of digital circuits has traditionally employed HDL descriptions written manually using a design language such as VHDL.
However, this method is proving to be too slow and alternative methods are required for rapid implementation of algorithms on hardware.

This master's thesis investigates whether Catapult C software by Mentor Graphics, Inc. is a fit tool for this task.
Furthermore, it investigates what kind of properties of the X.264 video codec could be included in the end product, which was estimated to have the resources of a PDA.
In the beginning of this thesis the operation of X.264 video codec is described for the benefit of those not familiar with video codecs.

As a result of this investigation, it was established that the Catapult Student version and its technology libraries were unable to create a working X.264 codec implementation on a FPGA.
The software's technology libraries were unfit for creating a VHDL description compatible with the chosen FPGA model.
However, it was clearly demonstrated that with better technology libraries the software shows a great deal of promise: a user with no knowledge of VHDL is capable of rapidly implementing various algorithms on a final end product.
Catapult C also enables co-design of both software and hardware, which makes simulation and verification of the algorithms simple and easy.
Abstract (fin): Digitaalisten piirien suunnittelu on jatkuvasti muuttumassa monimutkaisemmaksi.
Perinteinen suunnittelu VHDL-ohjelmointikielellä on osoittautumassa liian hitaaksi ja tarvitaan korvaavia menetelmiä algoritmien nopeaan toteutukseen.

Tässä diplomityössä on tutkittu pystyisikö Mentor Graphicsin Catapult C-ohjelmalla tähän nopeampaan suunnitteluun.
On tutkittu lisäksi millaisia ominaisuuksia X.264-videokoodekista voitaisiin sisällyttää lopulliseen kannettavalla laitteella toteutettavaksi aiottuun tuotteeseen.
Videokoodaukseen perehtymättömille on kuitenkin aluksi kuvattu yleisluonteisesti X.264-videokoodekin toimintaa.

Käytössä olevan Catapult C-ohjelman opiskelijaversion teknologiakirjastoilla FPGA-piirissä toimivan X.264 videokoodekin luominen kuitenkin epäonnistui.
Ohjelmisto ei pystynyt luomaan testattavaksi laitteeksi valitun FPGA-piirin kanssa yhteensopivaa VHDL-kuvausta.
Voitiin kuitenkin todeta, että paremmilla teknologiakirjastoilla ohjelmisto on lupaava: VHDL-kieltä tuntematon pystyy hyvin nopeasti rakentamaan algoritmeista valmiin lopputuotteen.
Sen avulla pystyy myös luomaan samaan aikaan fyysisen tason laitekuvauksen ja ohjelmistotason simulaatiomallin, joten toiminnallisuuden varmistaminen on helppoa ja yksinkertaista.
ED:2011-09-08
INSSI record number: 42717
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