Method and/or apparatus for determining minimum positive reference indices for a direct prediction mode
An apparatus comprising a first processing circuit and a second processing circuit. The first processing circuit may be configured to generate (i) one or more prediction samples and (ii) a plurality of macroblocks, in response to each frame of an input video signal. The second processing circuit may be configured to (i) select one or more reference indices for each of the macroblocks from one or more sets of reference indices and (ii) generate said one or more prediction samples in response to said selected reference indices. Each of the selected reference indices is generally determined based upon minimum and maximum values for each of the one or more sets of reference indices.
1. An apparatus comprising:
a first processing circuit configured to generate (i) one or more prediction samples and (ii) a plurality of macroblocks in response to each frame of an input video signal;
a second processing circuit configured (i) to select one or more reference indices for each of said macroblocks from one or more sets of reference indices and (ii) to generate said one or more prediction samples in response to said selected reference indices, wherein each of said selected reference indices is determined based upon minimum and maximum values for each of said one or more sets of reference indices.
2. The apparatus according to claim 1 , wherein said first circuit is further configured to generate transformed and quantized data in response to said plurality of macroblocks and said one or more prediction samples.
3. The apparatus according to claim 2 , further comprising:
an encoding circuit configured to generate an encoded bitstream in response to said transformed and quantized data.
4. The apparatus according to claim 1 , wherein each of said macroblocks is segmented into one or more sub-macroblocks.
5. The apparatus according to claim 1 , wherein said reference indices are selected using an operand equation that presents the maximum of a first and a second input when both inputs are negative.
6. The apparatus according to claim 1 , wherein said operand equation processes one of said macroblocks on each cycle of a clock.
7. The apparatus according to claim 6 , wherein said macroblocks comprise B-frame macroblocks.
8. The apparatus according to claim 1 , wherein said processing circuit comprises a first mode configured to process temporal direct luma references.
9. The apparatus according to claim 8 , wherein said first mode comprises an inter prediction mode.
10. A method for processing a digital video signal comprising the steps of:
(A) generating a plurality of macroblocks for each frame of said digital video signal;
(B) calculating a set of one or more reference indices for each of said macroblocks, wherein each of said one or more reference indices is calculated using an operand equation configured to present a minimum value of a first input and second input when both of said first and second inputs are positive and a maximum value of said first and second input when either or both of said first input and said second input are not positive; and
(C) generating one or more prediction samples for a current macroblock in response to said set of indices for said current macroblock.
11. The method according to claim 10 , wherein said method is further configured to generate transformed and quantized data in response to said plurality of macroblocks and said one or more prediction samples.
12. The method according to claim 11 , further comprising the step of:
generating an encoded bitstream in response to said transformed and quantized data.
13. The method according to claim 11 , wherein each of said macroblocks is segmented into one or more sub-macroblocks.
14. The method according to claim 11 , wherein said reference indices are selected using an operand equation that presents the maximum of a first and a second input when both inputs are negative.
15. The method according to claim 11 , wherein said operand equation processes one of said macroblocks on each cycle of a clock.
16. An apparatus comprising:
a first processing circuit configured to decode a bitstream in response to (i) one or more prediction samples and (ii) a plurality of macroblocks in response to each frame of an input video signal;
a second processing circuit configured (i) to select one or more reference indices for each of said macroblocks from one or more sets of reference indices and (ii) to generate said one or more prediction samples in response to said selected reference indices, wherein each of said selected reference indices is determined based upon minimum and maximum values for each of said one or more sets of reference indices.
17. The apparatus according to claim 16 , further comprising:
a generator circuit configured to generate said one or more sets of reference indices in response to (i) a macroblock partition parameter and (ii) a submacroblock partition parameter; and
a control circuit configured to generate said macroblock partition parameter in response to said plurality of macroblocks and one or more control signals.