http://www.rwonline.com/ shows the cover of the current Radio World
magazine, where the lead article is about the Samsung chip, built around a
SHDR100A peripheral processor and the SDHR200A main processor and flash and
RAM memory and which is currently available. The article discusses the power
requirements and all kinds of other HD developments shown at CES, including
the SiPort chip, which is also available to manufacturers now. Both consume
between 120 and 180 mW of power. Both chips are intended for integrated
devices.

If you qualify for an online subscription, you can read the entire article.