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PWLL, the p-Wave Locked Loop, helps determining instantaneously the p to p time interval of the ECG and enables us to perform heart rate variability studies with p_p variation. In the previous PWLL circuit, the prefixed delay given for changing over from r-wave to p-wave might fail to work for certain abnormal p_p variations present in ECGs. In this improved version of the PWLL, the time duration...
In heart rate variability studies PWLL the p-Wave Locked Loop, is used to determine instantaneously the p-p time interval of the ECG. The reported version of the PWLL needs the user to operate a manual switch as to changeover from the r-r pickup to p-p determination and locking. In order to make this changeover an automatic issue this paper proposes a modification to the PWLL such that no additional...
A multi-lingual TV system needs to broadcast the video with audio appearing in more than one language. In the receiver it gives option to the viewer to choose the desired language for his audio. This paper reports the realization of a TV channel incorporating six audio tracks needed for transmitting three stereo sounds. Four tracks of the audio are adaptive delta modulated and inserted in the Hsync...
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