Personal Listening Test of Opus, Celt, AAC at 75-100kbps
Reply #10 – 2012-11-18 09:23:18
x-axis=actual bitrate That was one query I did have about your method, Kamedo2 - mainly because I don't speak more than about 5 words of Japanese to find out for myself. As you have been so thorough, I expect we can assume that you tested the encoders on a larger collection (maybe 10 or many more CDs) of normal music to determine the target settings to achieve the bitrate target, and that you plotted THAT collection-wide bitrate (for the large sample size) on the horizontal axis of your graphs, ignoring the actual bitrate used for the test samples? Horizontal axis is always the average actual bitrate including headers and footers of each sample. I calculated filesize*8/(sample_num/44100) of each sample, typically 20-30sec. Then, I took the average of the 20 bitrates in bps. Larger collections are NEVER used. Encoded files are typically around 200KB. Opus should benefit form smaller codebooks in this case.larger collection (maybe 10 or many more CDs) of normal music My set of samples are fairly normal. At least they are not an array of super-critical fatboys, although short. The last 5 samples from the 20 samples I used.(Reunion Blues ~ Run up)http://zak.s206.xrea.com/bitratetest/bitra...st_wav25-29.zip list of audio file size in KB(1000B) 286 377 187 220 231 151 153 278 104 232 252 204 182 246 187 251 267 255 155 170 283 278 182 231 175 165 191 264 100 237 260 192 188 265 190 282 289 256 186 189 303 280 202 233 190 163 191 266 108 233 273 199 188 263 184 313 278 256 187 189 319 216 208 224 175 163 191 253 108 209 268 205 163 240 154 341 233 242 169 158 389 509 252 298 313 204 202 375 139 311 342 276 244 334 238 341 344 344 210 229 379 373 242 309 234 220 255 353 133 316 346 257 250 354 253 376 386 343 249 252 415 370 265 310 252 222 252 355 143 312 372 264 248 354 249 411 366 341 250 245 425 287 275 310 239 222 262 347 143 282 372 282 231 340 212 455 305 330 241 222 list of audio file bitrate including headers and footers in kbps(1000bps) 76 101 78 72 92 69 60 79 80 74 69 81 73 69 75 67 72 74 63 68 75 74 76 76 70 76 75 75 77 76 72 76 75 75 76 75 78 75 75 76 81 75 84 76 76 75 75 75 84 74 75 79 75 74 74 84 75 75 75 75 85 58 87 73 70 75 75 72 84 67 74 81 65 68 62 91 63 71 68 63 104 136 105 97 125 93 79 106 107 99 94 110 98 94 96 91 93 100 84 92 101 100 101 101 94 101 100 100 103 101 95 102 100 100 102 100 104 100 100 101 111 99 111 101 101 102 99 100 111 99 102 105 99 100 100 110 99 99 101 98 113 77 115 101 96 102 103 98 111 90 102 112 92 96 86 121 83 96 97 89