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Diffstat (limited to 'doc/ogg-multiplex.html')
| -rw-r--r-- | doc/ogg-multiplex.html | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/doc/ogg-multiplex.html b/doc/ogg-multiplex.html index 41c1481..0674400 100644 --- a/doc/ogg-multiplex.html +++ b/doc/ogg-multiplex.html @@ -117,16 +117,17 @@ Streams'.</p> <h3>Seeking</h3> -<p>Ogg is designed to use a bisection search to implement exact -positional seeking rather than building an index; an index requires -two-pass encoding and as such is not acceptable given the requirement -for full-featured linear encoding.</p> - -<p><i>Even making an index optional then requires an -application to support multiple methods (bisection search for a -one-pass stream, indexing for a two-pass stream), which adds no -additional functionality as bisection search delivers the same -functionality for both stream types.</i></p> +<p>Ogg is designed to use an interpolated bisection search to +implement exact positional seeking. Interpolated bisection search is +a spec-mandated mechanism.</p> + +<p><i>An index may improve objective performance, but it seldom +improves subjective performance outside of a few high-latency use +cases and adds no additional functionality as bisection search +delivers the same functionality for both one- and two-pass stream +types. For these reasons, use of indexes is discouraged, except in +cases where an index provides demonstrable and noticeable performance +improvement.</i></p> <p>Seek operations are by absolute time; a direct bisection search must find the exact time position requested. Information in the Ogg |