search for: lfe

...rake): - if there are 6 channels or less, the layout is set by the decoder as per the FLAC specification - if there are more than 6 channels, the layout is not set by the decoder, and instead the default libavcodec channel layout guess is used -> 7 channels, 6.1 (front left, right, center, lfe, back center, side left, right) -> 8 channels, 7.1 (front left, right, center, lfe, back left, right, side left, right) - the FLAC decoder and encoder do not reorder channels, so the internal libavcodec order is used -> it matches the WAVEFORMATEXTENSIBLE order for all common channels (s...

...der > > there are currently none defined for >2 channels but there could > be. i would write a proposal for this, but i don't think 4 bit is enough for all the different surround formats. for example in a ac3 encoder i can define any combination of left-right, center, surround and LFE channels. http://www.soundonsound.com/sos/nov01/images/surroundfig1dolbyblobs.l.gif there are different channel profiles for 5.1: L R C LFE Ls Rs (DVD) L R Ls Rs C LFE L C R Ls Rs LFE (Film) then we have ambisonics where we have 1st, 2nd and 3rd order (4, 9 and 16 channels), but then you can als...

Dear All, I am trying to use the felm function in the lfe package. However it does not seem to deal with missing values the way the lm function does. I wish to tell it na.omit or na.action = na.omit but it does not recognize this. I need to allow for missing values as I have different specifications and don't want to remove observations for all. Help...

...he ambisonic decoded output from vorbis and convolve it with inverse of these filters and get pretty much the orignal input back or you could also convolve it to match your own speaker layout and get better results than you would with the orignal 5.1 material. My only problem right now is with the LFE (subwoofer channel). I had been intending to just mix it into the W signal, which I think matches the intent of the channel. Obviously this really couldn't be recovered on decode. My alternative is to use a seperate LFE channel in the vorbis stream, which is just ugly. So, what I'm lookin...

...he ambisonic decoded output from vorbis and convolve it with inverse of these filters and get pretty much the orignal input back or you could also convolve it to match your own speaker layout and get better results than you would with the orignal 5.1 material. My only problem right now is with the LFE (subwoofer channel). I had been intending to just mix it into the W signal, which I think matches the intent of the channel. Obviously this really couldn't be recovered on decode. My alternative is to use a seperate LFE channel in the vorbis stream, which is just ugly. So, what I'm lookin...

Now that we've selected a channel mapping for 7 and 8 channel flac, the command-line encoder tools needs updating to accept wav files with compatible channel maps. -r -------------- next part --------------

...ht</li> <li>3 channels: left, right, center</li> - <li>4 channels: left, right, back left, back right</li> - <li>5 channels: left, right, center, back/surround left, back/surround right</li> - <li>6 channels: left, right, center, LFE, back/surround left, back/surround right</li> - <li>7 channels: not defined</li> - <li>8 channels: not defined</li> + <li>4 channels: front left, front right, back left, back right</li> + <li>5 channels: front left, front right, fr...

...4:36 PM, Tim W. wrote: > - 4 channels: left, right, back left, back right (FL FR BL BR) > - 5 channels: left, right, center, back/surround left, back/surround right > (FL FR FC BL BR or FL FR FC SL SR, same order so doesn't matter) > - 6 channels: left, right, center, LFE, back/surround left, back/surround right > (FL FR FC LFE BL BR or FL FR FC LFE SL SR, same order so doesn't matter) I looked at the 'flac' command-line front-end code today, and it uses Back Left and Back Right for 4 channel but Side Left and Side Right for 5 and 6 cha...

On Fri Sep 21 16:31:21 2012, Stephen F. Booth wrote: > 6.1: L R C LFE Ls Rs Cs (MPEG 6.1 A layout) I'm confused. WAV puts the rear centre before everything but 'Front left of center' and 'Front right of center'. Are you saying you prefer the extra front channels to to side/rear surround, or that you prefer the MPEG order to the WAVE order? -...

Curt Sampson wrote: > On Sun, 24 Aug 2003, smoerk wrote: > > >>there are different channel profiles for 5.1: >>L R C LFE Ls Rs (DVD) >>L R Ls Rs C LFE >>L C R Ls Rs LFE (Film) > > > I don't see why you need more than one of the above formats. It's not > like you can't decide to put the LFE channel into "input 3" or "input 5" > or whatever set of inputs your...

...hannels: left, right, back left, back right (FL FR BL BR) >> - 5 channels: left, right, center, back/surround left, back/ >> surround right >> (FL FR FC BL BR or FL FR FC SL SR, same order so >> doesn't matter) >> - 6 channels: left, right, center, LFE, back/surround left, back/ >> surround right >> (FL FR FC LFE BL BR or FL FR FC LFE SL SR, same >> order so doesn't matter) > > I looked at the 'flac' command-line front-end code today, and it uses > Back Left and Back Right for 4 channel but...

...annel_mask == 0x0037 || /* 5 channels: front left, front right, front center, back left, back right */ channel_mask == 0x0607 || /* 5 channels: front left, front right, front center, side left, side right */ channel_mask == 0x003f || /* 6 channels: front left, front right, front center, LFE, back left, back right */ - channel_mask == 0x060f /* 6 channels: front left, front right, front center, LFE, side left, side right */ + channel_mask == 0x060f || /* 6 channels: front left, front right, front center, LFE, side left, side right */ +...

Hi , I was trying to guess the channel order or Tremor decoder for 5.1 channel file. Though the standard state it to be FL,C,FR,RL,RR,LFE but in my opinion its FL,C,FR, LFE RL,RR. I am not sure if my guess is correct . I came to this conclusion after downmixing from five to two channels. If i assume the channel order to be as per the standard then my two channel output is not correct but if i take it to be FL,C,FR, LFE RL,RR. then...

On Sun, 24 Aug 2003, smoerk wrote: > there are different channel profiles for 5.1: > L R C LFE Ls Rs (DVD) > L R Ls Rs C LFE > L C R Ls Rs LFE (Film) I don't see why you need more than one of the above formats. It's not like you can't decide to put the LFE channel into "input 3" or "input 5" or whatever set of inputs your sending it to, depending on how...

...search to determine the 'correct' speaker >placement for my ambisonic conversion. What resources did you use for 'correct' placement? I *STILL* haven't set up my full rig at my new house - and i've been here for eighteen months. >> In particular it says that the LFE track is for option reinforcement, >> so while the idea is to encode it separately and mix it into the >> subwoofer channel, mixing it into the other 5 is acceptable, as is >> ignoring it. Don't know how safe that is in practice. >I just can't figure out what the orign...

...terleaving is different to the original wave file (a 5.1 WAVEFORMATEXTENSIBLE file). Is the channel order specified for OggVorbis files, or is there a way I can retrieve this information from the file itself ? On a related note ... do any of the encoders assume that a particular channel contains LFE only ? Thanks for any help you can give me. Dan -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/vorbis/attachments/20060626/badfff1d/attachment.html

i didn't find anything about tagging flac files as surround files. i think there should some possibility to tell the player how to play a multi-channel file (how to map the different channels to the speakers or if there some decode is needed, like for ambisonic files). any idea how to implement it?

...pus.h refers to the Vorbis channel mapping order, so does mapping in Opus take that order and re-arrange it? For example, opus_multistream_surround_encoder_create() sends out mapping[] = {0, 4, 1, 2, 3, 5}. For 6 channels the Vorbis order is front left, center, front right, rear left, rear right, LFE. So does this mean that Opus is asking for front left, rear right, center, front right, real left, LFE? Seems a little odd. Brendan

On 12-10-12 4:47 AM, Erik de Castro Lopo wrote: > I've read through this thread and it didn't really come to any > conclusion. Can we try again and make a decision this time? Anyone else have thoughts on this? I'd like to get this added before the 1.3.x release. Especially helpful would be research into what current tools actually do. -r

Hi , I am trying to optimize OPUS codec to TI compiler C64XX in CCS. I have created the make file and compiled the code in optlevel = 3. The MIPS are pretty high(99 MIPS for 8Khz stereo) for LFE channels and the most MIPS intensive function is the silk_noise_shape_quantizer_del_dec() function. 1. I am trying to convert this entire function to assembly. I have tried to incoporate .asm file but I get linking error as shown below undefined first referenced symbol in file --...