Automatic Genre and Show Identification of Broadcast Media
Table 5: Genre/show classification accuracy using meta-data
['Meta-Data', 'Genre ID', 'Show ID']
The data used in the experiments also includes some meta-data, such as the BBC broadcast channel number, the date and time of broadcast, and other unstructured information. Using some of the structured meta-data is studied next to learn how the classification accuracy can be improved further. Since these programmes were broadcast during 6 weeks in April and May 2008, using the date was not likely to be helpful which we verified in the experiments. Instead, the time of broadcast, splitting 24 hours into 8 chunks, and channel number, in this setup 1–4 corresponding to BBC1, BBC2, BBC3 and BBC4, were appended as one-hot-vectors to the inputs of the SVM classifiers and their effect is studied. Adding these meta-data helps for both tasks. When comparing channel and time, in both tasks appending time helps more and the difference is bigger in case of the show ID task (72.8% vs. 77.7%). Combining channel information and time of broadcast also helps further improve the classification accuracy in both tasks and overall with meta-data there is 5.9% and 15.3% absolute improvement in accuracies of genre ID and show ID tasks.