Tesis previa a la obtención del Título de Ingeniero en Electrónica y ...

ANNEXB
(to Recommendation H.261)
Hypothetical reference decoder
The Hypothetical reference decoder (HRD) is defíned as follows:
B. 1 The HRD and the encoder have the same clock frequency as well as the same CIF rate, and are operated
synchronously.
B.2 The HRD receiving buffer size is (B + 256 • ¿Tbits). The valué of B is defined as follows:
B = 4Rmax/29.97 where R^iax is the máximum video bit rate to be used in the connection.
B.3 The HRD buffer is initially empty.
B.4 The HRD buffer is examined at CIF intervals (=33 ms). If at least one complete coded picture is in the buffer
then all the data for the earliest picture is instantaneously removed (e.g. at tn+i in Figure B-1/H.261). Immediately after
removing the above data the buffer occupancy must be less than B. This is a requirement on the coder output bitstream
including coded picture data and MBA stuffing but not error correction framing bits, fíll mdicator (Fi), fíll bits or error
correction parity Information described in § 5.4.
FIGURE B-1/H.261