Is listening to a Dharma talk while walking considered a form of walking meditation?

Sometimes when I take a break from work and walk through a nature path, I listen to a podcast called Zencast which is a collection of hundreds of Dharma talks by dozens of teachers over the decades such as Thich Nhat Hanh and Gil Fronsdal spanning a wide array of topics, such as Five Hindrances, mindfulness, meditation, etc. I highly recommend it, it's a great way to consume teachings on an iPod. When I do this, I am present with body in nature and with mind in enlightened knowledge, but is this technically a technique for a walking meditation?