1. External links

The MPEG user data feature provides a means to inject application-specific data into an MPEG elementary stream. User data can be inserted on three different levels:

• The sequence level
• The group of pictures (GOP) level
• The picture data level

Applications that process MPEG data do not need to be able to understand data encapsulated in this way, but should be able to preserve it.

Examples of information embedded in MPEG streams as user data are:

• Aspect ratio information
• "Hidden" information per the Active Format Descriptor specification
• Closed captioning per the EIA-708 standard

External links

• ATSC
• DVB

• Clifford, Virginia
• Clifford V. Smith Jr.
• Clifford Walwyn
• Clifford (ward)
• Clifford W. Beck
• Clifford, William
• Clifford Williams (academic)
• Clifford Williams (rugby)
• Clifford Williams (rugby league)
• Clifford Winston
• Clifford, Wisconsin
• Clifford Woodhead
• Clifford Wright
• Clifford W. Trow
• Clifford Y. Stephens
• Clifford–New Glasgow Historic District
• Clifford’s Inn
• Cliffortioides
• Cliff Pace
• Cliff Parker
• Cliff Parker (disambiguation)
• Cliff Parker (English football)
• Cliff Parker (footballer)
• Cliff Park High School
• Cliff Park Ormiston Academy