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Limited By:	Subject = speech processing;

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A combined audio-visual contribution to event detection in field sports broadcast video. Case study: Gaelic football (2003)

Sadlier, David A.; O'Connor, Noel E.; Marlow, Seán; Murphy, Noel

A combined audio-visual contribution to event detection in field sports broadcast video. Case study: Gaelic football (2003)

Sadlier, David A.; O'Connor, Noel E.; Marlow, Seán; Murphy, Noel

Abstract:

In this paper we propose novel, audio-visual analysis techniques for event detection in broadcast TV sports video content. The scope of the design is constrained to the specialized domain of 'field sport', and specifically, Gaelic Football is presented as an experimental case study. We show that a combination of speech-band energy tracking in the audio domain, coupled with colour dominance pattern recognition in the video domain, provides a useful contribution to event detection for broadcast Gaelic Football matches. It is projected that, any conclusions made therein may be extended such that they function on sports content of a similar nature such as American Football, Australian Rules, Rugby Union etc.

http://doras.dcu.ie/244/

Marked Mark

A Novel Efficient Algorithm for Music Transposition (1999)

Lawlor, Bob; Fagan, A.D.

A Novel Efficient Algorithm for Music Transposition (1999)

Lawlor, Bob; Fagan, A.D.

Abstract:

We present a novel efficient algorithm for scaling the frequency content of an audio signal by any desired factor in the range 0.5 (minus one octave) to 2.0 (plus one octave) enabling a recording to be played in any desired key without affecting the tempo. The algorithm uses an adaptive overlap-add (AOLA) technique to realise the desired frequency scaling without affecting the duration. Informal listening tests show output quality equal to that of a conventional overlap-add algorithm used in many commercially available systems, but offering significant computational saving relative to that algorithm. The algorithm is also used to simultaneously scale both the tempo and key of a recording.

http://mural.maynoothuniversity.ie/9709/

Marked Mark

Rhythm detection for speech-music discrimination in MPEG compressed domain (2002)

Jarina, Roman; O'Connor, Noel E.; Marlow, Seán; Murphy, Noel

Rhythm detection for speech-music discrimination in MPEG compressed domain (2002)

Jarina, Roman; O'Connor, Noel E.; Marlow, Seán; Murphy, Noel

Abstract:

A novel approach to speech-music discrimination based on rhythm (or beat) detection is introduced. Rhythmic pulses are detected by applying a long-term autocorrelation method on band-passed signals. This approach is combined with another, in which the features describe the energy peaks of the signal. The discriminator uses just three features that are computed from data directly taken from an MPEG-1 bitstream. The discriminator was tested on more than 3 hours of audio data. Average recognition rate is 97.7%.

http://doras.dcu.ie/246/

Displaying Results 1 - 3 of 3 on page 1 of 1