5 Seconds of Silence.mpc |
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5 Seconds of Silence.mpc |
 May 9 2002, 04:27
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#1
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Group: Members Posts: 56 Joined: 11-January 02 Member No.: 986  |
3kb? I have 5 seconds of silence encoded from the Korn "Follow The Leader" cd that is playing at 3kbps. If it's 5 seconds of silence why is it playing at 3 kbps? Thanks Jeff
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May 9 2002, 04:38
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#2
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 Administrator Group: Admin Posts: 2372 Joined: 22-September 01 Member No.: 3 |
3 (or rather 3.5) kbps is the bitrate that MPC is using for complete silence. It's a true VBR codec, so why shouldn't it use this bitrate? It's not limited to 32 kbps or so, on the lower end.
My question would be a different one: Why isn't it using 1 kbps? :eyebrow: 
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May 9 2002, 22:58
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#3
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Group: Members Posts: 35 Joined: 28-April 02 From: Canada Member No.: 1896 |
I think he was meaning that...
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May 9 2002, 23:12
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#4
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Group: Members Posts: 56 Joined: 11-January 02 Member No.: 986 |
Coolin, "I think he was meaning that... "
Yes, Coolin I was. Why is it playing at 3kbps as opposed to 1 or even 0 if it's true silence? Thanks Jeff |
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May 9 2002, 23:48
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#5
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Administrator Group: Admin Posts: 2372 Joined: 22-September 01 Member No.: 3 |
QUOTE Originally posted by jjarmak
Yes, Coolin I was. Why is it playing at 3kbps as opposed to 1 or even 0 if it's true silence? Thanks Jeff I don't know why. Seems that 3 or 3.5 kbps (~400 byte/sec) is the minimum to store the metadata. This is 5 seconds of silence, encoded with MPC --standard: QUOTE MP+À _ ` ÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ €:ÿ
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May 9 2002, 23:55
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#6
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Group: Members Posts: 56 Joined: 11-January 02 Member No.: 986 |
MP+À _ ` ÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ` ÿÿÿÿÿÿÿÿÀÿÿÿÿðÿÿÿÿ F ÿÿÿÿ üÿÿÿ?€ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿ F ðÿÿÿÿüÿÿÿ?€ ÿÿÿÿ ÿÿÿÿ`ÿÿÿÿÀÿÿÿÿÿÿÿÿF ðÿÿÿÿ ÿÿÿÿ€ üÿÿÿ?ÿÿÿÿ` ÿÿÿÿÀÿÿÿÿÿÿÿÿ ðÿÿÿÿ Fÿÿÿÿ üÿÿÿ?€ÿÿÿÿ €:ÿ
What is that? |
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May 10 2002, 00:00
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#7
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Group: Members Posts: 35 Joined: 28-April 02 From: Canada Member No.: 1896 |
I'm guessing it's just the overhead to store stuff like time and song info?
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May 10 2002, 01:05
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#8
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Administrator Group: Admin Posts: 2372 Joined: 22-September 01 Member No.: 3 |
QUOTE Originally posted by jjarmak
What is that? That's the whole MPC file. Encoded silence. edit: i like to edit, so what |
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May 10 2002, 01:19
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#9
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Nero MPEG4 developer Group: Developer Posts: 1466 Joined: 22-September 01 Member No.: 8 |
Each audio frame in MP2/MP3/MP+/AAC contains:
frame header + spectral data + side data In your case, spectral data is ZERO (or near zero), but each frame requires passing the header and some small amount of side bits - and this is why the lowest bit rate is around 3 kbps in MPC. |
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May 10 2002, 01:26
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#10
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 Crossfeed Developer Group: Developer Posts: 253 Joined: 24-January 02 From: Enola, PA, USA Member No.: 1152 |
The only real overhead on each frame is the 20 bits used for determining the frame size (the remaining bits are audio data). All metadata (title, artist, album, etc.) are stored in APE or ID3 tags.
This looks like a known limitation, because on Frank's site he says that digital silence will be redone in a more efficient manner sometime in the future. Not really important... 3.5 kbps or 1 kbps; not much of a difference unless you like listening to silence... 
EDIT: Ivan got to it first 
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May 10 2002, 01:51
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#11
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Administrator Group: Admin Posts: 2372 Joined: 22-September 01 Member No.: 3 |
P.S.: What genre is this? Someone go bug www.id3.org to add a new genre "silence".
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May 10 2002, 04:03
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#12
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 MPC Developer Group: Developer Posts: 543 Joined: 15-December 01 From: Germany Member No.: 659 |
QUOTE Originally posted by Ivan Dimkovic
Each audio frame in MP2/MP3/MP+/AAC contains: frame header + spectral data + side data In your case, spectral data is ZERO (or near zero), but each frame requires passing the header and some small amount of side bits - and this is why the lowest bit rate is around 3 kbps in MPC. Resolution for the subbands must be encoded. Then the encoder knows he don't need anything more. try mppenc --bw 800 ... -------------------- -- Frank Klemm
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May 10 2002, 16:55
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#13
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 Group: Members Posts: 913 Joined: 15-December 01 From: Germany Member No.: 662 |
I felt like being funny today so I actually tried --bw 400 (the encoder said max bandwith 689 was being used; guess that's the bandwith of the lowest subband). Wow! What a space saver!
Allthough it seems to loose a little treble. 
Anyway, playback in Winamp was fine but the command line decoder (1.01j) refused to decode the file. It gave the following error when trying to decode the "death" sample: "broken frame 0/2272 (decoded size=24272, size in stream=973)". I tried this on two songs and the result was the same. As soon as a higher bandwith than 689 was used, mppdec did it's job. I guess this will hardly ever be an issue, but maybe the underlying bug also affects decoding of regular files. |
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May 11 2002, 07:07
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#14
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Group: Members Posts: 79 Joined: 5-May 02 Member No.: 1970 |
It may not be perfect silence either. Although hopefully it is.
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Lo-Fi Version | Time is now: 22nd May 2013 - 15:03 |
