By ANDREW YOUNG,

Entertainments Editor

IN an atmosphere of imminent change, New Television is to be the theme

of this year's Edinburgh International Television Festival.

It will kick off on August 25 with Rupert Murdoch giving the

MacTaggart Memorial Lecture on Freedom in Broadcasting, and will end

with Janet Street-Porter, the chair of this the fourteenth festival,

calling on key voices from the industry to describe the future of

television as they see it.

With deregulation, satellite, franchised optioning, and issues such as

Channel 4 and the new Channel 5, this is being seen as the most

important festival so far. Already it is a complete sell-out with more

than 900 delegates due to take part.

So great is the demand for tickets for the MacTaggart lecture -- the

only session open to the public -- that for the first time it is being

held in the McEwan Hall.

Giving details at a news conference in London yesterday Ms

Street-Porter said that, after delivering his prepared lecture, Mr

Murdoch would remain on stage for a question and answer session with

what is likely to be a near-2000 audience.

The following morning David Dimbleby will chair a session on the ''new

regulators'' with a panel that will include Lord Rees Mogg, chairman of

the Broadcasting Standards Council, and George Russell, chairman of the

IBA, soon to be the Independent Television Commission.

The proceedings will be spiced up with the next session --

Pornography, Erotica, and Percy Filth -- suggested by one of the

panelists, Sir Denis Forman, deputy chairman of the Granada Group. It

will deal with the fact that satellite technology has upped the stakes

in the sex-on-TV debate. Dr Germaine Greer is another panelist.

Another session will put the question: How can broadcasting freedoms

be protected in the context of censorship, secrecy, and violence? Yet

another session will ask if it is possible to put together drama

co-production packages without casting Jane Seymour as the heroine. The

penultimate session will deal with the reporting of the revolution in

China.

Asked about the statement by Mr Gus Macdonald, director of programmes,

Scottish Television, that the festival was moving to Glasgow, Ms

Street-Porter said: ''It was debated but was not agreed upon.

''Gus was a little premature. A feasibility study was done on venues

and we decided against it because the venues we wanted were too far

apart.''