RealNetworks

(RNWK) - Get Report

, which produces software for receiving audio and video over the Internet, said

Sony

(SNE) - Get Report

will include both RealPlayer and RealJukebox with its portable music devices and Vaio PCs, beginning in 2001.

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RealNetworks will use Sony's latest high quality audio compression technology in its updated RealSystem 8, which the company unveiled today.

Shares of RealNetworks were recently up $1.31, or 6%, to $23.31 in

Nasdaq

trading, while shares of Sony fell $1.94, or 2%, to $95.06 on the

New York Stock Exchange

.