Descriptive Video Service/Descriptive Video Information (DVS/DVI) is a means of making television more accessible to the visually impaired by providing a spoken description of a program's key visual elements. DVS/DVI uses stereo technology to transmit a second, separate audio channel. Settings, actions, scene changes and body language can thus be described without interfering with the program's dialogue. To receive DVS/DVI, viewers must have a stereo TV or a stereo VCR that includes the Second Audio Program (SAP) channel. Most TVs and VCRs now sold include this feature.
Several PBS programs broadcast by Iowa Public Television, including Masterpiece Theatre and Mystery! now include DVS/DVI. These programs are identified in our Advance program guide. The service can be received only from IPTV's stereo-equipped transmitters: Channel 11, Des Moines; and Channel 12, Iowa City.