Dynamic packet size control for MPEG-4 data partition mode

US9113162B2 · kind B2 · utility

Assignee

• NVIDIA Corporation · US

Inventors

• Ram Prabhakar · Palo Alto, US
• Harikrishna Madadi Reddy · San Jose, US
• Lefan Zhong · Santa Clara, US
• Wei Sun · Boulder, US
• Leonardo Vainsencher · San Jose, US
• Visalakshi Vaduganathan · Fremont, US

Key dates

• Filing date: Dec 27, 2007
• Grant date: Aug 18, 2015
• Expiry date: Nov 23, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/89
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A dynamic AC prediction technique is implemented in a data partition mode which automatically disables AC prediction for encoding the current macroblock in the next packet when packet overflow occurs. Otherwise, when there is no overflow, AC prediction remains enabled to maintain compression efficiency. More particularly, in the preferred embodiment, a determination is first made whether a macroblock causes a packet overflow if it is encoded in the current packet. If so, a new packet is initiated into which the macroblock is encoded without AC prediction as the first macroblock. Otherwise, the macroblock with AC prediction remains in the current packet and a new macroblock is encoded.