Skip to main content ↑ ↓

Notice

Please note that most of the software linked on this forum is likely to be safe to use. If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here.
Topic: what's the meaning of "lookahead"? (Read 6208 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

what's the meaning of "lookahead"?

what's the meaning of "lookahead"?

Reply #1 –
Ugh, what do you mean? Where do you see that? Why are you asking in Speech Codecs forum?
The only tip that one can give you for such a vague question is that "lookahead" = "look ahead" (looking at something that is incoming). Perhaps Wikipedia definition has a good answer for your badly stated question.
 

what's the meaning of "lookahead"?

Reply #2 –
I don't know of a specific meaning in the context of Speech Codecs.
AFAIK in general audio it means "looking or listening to a signal before it's actually needed". This will give you some extra time to decide what to do with it.
Example: in the old days of LP vinyl cutting, the analog mastertape was played back on a special recorder with 2 playback heads. The first head was used by the mastering engineer to listen to the tape (and see the peak level on a meter) and make small corrections if needed. The second head was used to feed the cutter. There was a delay of (IIRC) a few seconds between them (depending on the tape speed) so the engineer had some time to react (usually to reduce level peaks to prevent distortion).

Hope that answers your question.