Hardware


To record the database, two different cameras were used; a cheap analogue web cam and a high quality digital camera. For the duration of the recordings the cameras were left in automatic mode. In parallel, two microphones, a poor quality one and a good quality one were used. The database was recorded onto a PAL DV system. PAL DV is a proprietary format which captures video at a colour sampling resolution of 4:2:0. The audio was captured in both 16bit and 12bit audio frequency at 32kHz. The video data is lossy compressed at the fixed ratio of 5:1. The audio data remains uncompressed. This format also defines a frame accurate timecode which is stored on the cassette along with the audio-visual data. This video hardware can easily be interfaced to a computer allowing frame accurate retrieval of the data in the database onto the computer disk.


Any comments or general enquiries please contact: Chi Ho Chan (Chiho.Chan@surrey.ac.uk)