![]() ![]() My first inclination would be to make it around 280. I would experiment with various thresholds for switching from adding bits to mantissas to adding bits to exponents. The table corresponding to approximately the current choices would be the default, but Aften could choose other tables in response to the results of bit allocation.įor high bitrate encoding, average quality of 280 to 300 is fairly common, with values in some sections averaging 340 to 350. ![]() My first thought is to create separate exponent strategy set tables to group together sets that use about the same number of bits. In some cases bits are clearly wasted on the mantissas and could be put to better use increasing accuracy of the exponents. In Aften, the set of 6 exponent strategies for each channel are chosen from a list that usually gives somewhere around 400-500 bits/channel. In AC-3, exponents can take up anywhere from about 100 to 2500 bits per channel, per frame. The exponent strategy decision in Aften is somewhat simple. The first thing, which I vow to get finished soon, is channel coupling, but there are other things I want to try out too. I've been thinking about how to improve the quality of Aften. ![]()
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