This follows last month's announcement of an updated iMac desktop computer, adding features and introducing lower priced models.
Apple, in an emailed invitation, would only reveal that it has scheduled the media event for Wednesday in San Francisco.
According to Goldman Sachs analyst David Bailey -- and several Apple fan sites -- the new iPods would be the first to be based on a version of Apple's homegrown computer operating system. They will be about an inch shorter and will be capable of storing more digital media, according to Apple fan sites.
One major source of speculation is whether there will be new models introduced with touch screen technology - similar to the screens on iPhones.
Source: Wall Street Journal