Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2005-08-30
2005-08-30
Rao, Andy (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240060
Reexamination Certificate
active
06937653
ABSTRACT:
A rate control apparatus for real-time video communication includes: an initialization unit for setting an initial value required for rate control according to a transmission speed and the number of input frames; a target bit calculation unit for obtaining the target number of encoding bits, maximum allowable number of bits, and minimum allowable number of bits in consideration of a buffer state and a transmission speed; a rate control and encoder unit for executing rate control and encoding using the maximum allowable number of bits and the minimum allowable number of bits; a stuffing control unit for comparing the size of a bit stream from the rate control and encoding unit with the target number of encoding bits from the target bit calculation unit for thereby outputting stuffing bits; a buffering unit for storing a combination of the bit stream from the rate control encoding unit and the stuffing bits from the stuffing control unit for thereby outputting them to the target bit calculation unit; a frame skip unit for outputting a frame skip signal according to the buffer occupied state signal from the buffering unit; and a control logic unit for controlling an encoding process of each of the above elements and determining whether or not the next input frame is encoded according to the frame skip signal from the frame skip unit.
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Chung Jae-Won
Kang Hyun-Soo
Song Joon-Ho
Baker & Botts LLP
Hyundai Electronics Industries Co,. Ltd.
Rao Andy
LandOfFree
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