There are two groups of patents related to G.729 (and to other codecs, and to many other signal processing techniques, such as modems). There are patents for algorithms, and patents for signal processing apparatus. The ones about algorithms - generally computational techniques to speed it up - are not an issue outside the US. Even in the US they can generally be sidesteped, by using slower methods to achieve the same effect. The ones covering signal processing equipment exist in many markets, especially most of Europe. Whatever your view on software patents, as soon as you run a G.729 code somewhere you have a physical device infringing those patents.
How can generic PC hardware be covered by a patent? It's just a piece of software, that is, algorithms neatly put together with some control etc.
roy
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