Fourteen hours of straight news every day. Hard-hitting documentaries. Correspondents in oft-overlooked corners of the country. And fewer commercials than any other news channel.

It sounds like something a journalism professor would imagine. In actuality, it is Al Jazeera America, the culmination of a long-held dream among the leaders of Qatar, the Middle Eastern emirate that already reaches most of the rest of the world with its Arabic- and English-language news channels. The new channel, created specifically for consumers in the United States, will join cable and satellite lineups on Tuesday afternoon.

Al Jazeera America is the most ambitious American television news venture since Rupert Murdoch and Roger Ailes started the Fox News Channel in 1996. It faces some of the same obstacles that Fox eventually glided over — including blanket skepticism about whether distributors, advertisers and viewers will give it a chance. But that is where the parallels to other channels end, because Al Jazeera America is going against the grain of seemingly every trend in television news.

“Viewers will see a news channel unlike the others, as our programming proves Al Jazeera America will air fact-based, unbiased and in-depth news,” said Ehab Al Shihabi, the channel’s acting chief executive, on a news conference call last week. He was explicit about what will be different, saying, “There will be less opinion, less yelling and fewer celebrity sightings.”