What movie is this scene from

A few months ago I walked by a TV and saw a movie I vaguely remember from when I was a kid. I only saw about a minute of a movie, but am curious what the movie was since I saw it when I was younger and have forgotten it.

I think I saw the beginning, but it was in an apartment building or hotel, about 20 floors up. There is a naked woman lying on her stomach in bed and a guy is sitting on the bed talking to her. Even though the woman is talking, her body isn’t moving which was weird. After talking a bit the guy turns the woman over and her face is decomposed, as if she died a long time ago. He screams and falls backwards through the window and lands on the walking area of the hotel/apartment complex’s pool.

The next scene is the brother of the guy who died sitting on a bus (I believe it was winter) going home so he can go to his brother’s funeral.

Does anyone have any ideas? The movie seems set in the 1970s if that helps.

Ghost Story - Ghost Story (1981) - YouTube

Thank you. This is the kind of teamwork problem solving outcome the military should’ve been considering when they invented the internet.