<< Chapter < Page Chapter >> Page >
This module contains a conclusion and summary of work done on a real-time laugh track removal system. It is part of a larger series discussing the implementation of this system.

Summary

We have looked at the various ways that a laugh track can be detected and how to implement a laugh track detection algorithm as a Directshow filter. The most effective way of detecting a laugh track appears to be looking at the waveform in the time domain instead of in the frequency domain. The algorithm to use for envelope detection can be changed and become increasingly more sophisticated as we attempt to catch and process correctly some of the more difficult cases.

Detection techniques

There are multiple ways to generate the envelope we use for detecting a laugh track. The simplest method is to square the signal and then low pass filter it, which gives quite good results. An even better algorithm involves using a Hilbert transform to generate the envelope, but this was too computationally expensive to implement in our Directshow filter.

We have also briefly discussed some of the ways to detect the envelope once we have generated a signal to pick out laughs from. On the simpler range of the spectrum, we can have a width and height thresholds for the laugh portion of the signal's envelope. On the other hand, we could also fit laugh tracks to polynomial curves and then use a Support Vector Machine to detect laugh tracks based on a database of positive and negative matches for laugh tracks.

In the end, we found that detecting and removing laugh tracks from an audio signal is much more complicated than it may appear on the surface. As a human, it is very easy to spot a laugh in the signal, but to create a system that can do this automatically is more complicated. Another interesting aspect of the system is how to remove the laugh tracks, which can be complicated because people often talk over the laugh tracks in our signals. To remove only the laugh track while leaving in the human voice signals is something that needs further exploration.

Questions & Answers

how does economics define me
clement Reply
what are the factors that determines the demand and supply
sillah
what are the importance of Economics
Betty Reply
tell me something very important about economics..
Fayaz Reply
how may I solve arithmetic mean ,,,all example
Cee Reply
what is agriculture
Itoe Reply
simple method of understanding cost concept
Oludare Reply
what is inflation
Christiana Reply
Inflation is a general increase in price levels
Zuko
is the action of inflating something
Abdifatah
inflation is the persistent increase in general price level of goods and services in an economy over a considerable period of time .
Tetteh
inflation is the general increase of a commodity in a particular period of time.
Turay
inflation is a general increase in price levels of commodities
shehu
what are the types of inflation?
Ebrima
inflation is the period of persistent rise in the general level of the price of goods services over time
Emmanuel
we have creeping inflation, demand pull inflation ,cost push inflation, and galloping inflation .
Emmanuel
how can a location of a firm create difference between producers
joy Reply
what is monetary policy
joy
hello
Abdifatah
is a monetary from policy that's authorized of country encharces
Abdifatah
What would you say about the the mobility of enterprise as a factor of production?
Cathryn Reply
how can I connect myself to this Ambrose platform
kanu Reply
I am good and you I am from sierra Leone and I am new her
kanu Reply
u are welcome bro, here is a good platform for you to be
Alie
That i know,thanks bro.
what the main definition of economic
Uhara Reply
the main definition is given by prof Lionel Robbins as a social science which studies human behavior between ends and scarce which have alternative uses
olajumoke
what covers macro economics.
Fayaz
Essay about Microsoft
Kwena Reply
what is economics
Julie Reply
what do you mean by means in economics
Julie
economic is the wealth of a country.
Moussa
monetary policy is refer to as being expansionary or contractionary.
Abdul
pls who can help me to explain money market and capital market
Au
money market is base on short term loan which is within one year period while capital market is long term loan more than one year...
Muhammad
money market is a market were short term loans are dealt with while capital market is a market were long term loans are traded
Ebrima
What is mean by monetory policy
Lovely
monetary polices are rules that control the rate of monetary exchange in an economic as a whole.
Ebrima
wealth of the nation
Uhara
important of unemployment
Otwe Reply
Important of unemployed
Otwe
important?
Aneela
While the American heart association suggests that meditation might be used in conjunction with more traditional treatments as a way to manage hypertension
Beverly Reply
in a comparison of the stages of meiosis to the stage of mitosis, which stages are unique to meiosis and which stages have the same event in botg meiosis and mitosis
Leah Reply
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Elec 301 projects fall 2007. OpenStax CNX. Dec 22, 2007 Download for free at http://cnx.org/content/col10503/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Elec 301 projects fall 2007' conversation and receive update notifications?

Ask