[Mp4-tech] Bit rate and compression Ratio

[Dakshinamoorthy R]

Dear Prasanth,
1) what is the difference between data rate and compression ratio?
Ans: data rate is bits/sec  say 64kbps  ---> 64 kilo bits per second 
     compression ratio: ratio between input file size of encoder to output 
file size of encoder ( like 4:1, 11:1 etc..)
If your compression ratio is higher you can transmit, your data in low 
bitrate channel( mobile application need high compression ratio since band 
with is less) high compression is always trade-off with quality (more 
compression will decrease the quality).
2) How to calculate the MIPS rate given the Processor Clock Frequency?
Ans: if your DSP processor execute one instruction per clock cycle and 
clock frequency is 300MHz
then the MIPS for that processor is  1 x 300 = 300 mips
some commercially available leading processors supports 8 instruction 
execution per clock cycle in that case the MIPS of the processor will be 8 
x 300 = 2400 MPIS  (assuming Processor clock freq is 300 Mhz) 
Regards,
R.Dakshinamoorthy
Project Leader, DSP- Group,
Embedded System,
L&T Infotech Ltd,
Chennai.
INDIA
Phone +91 44 22527072
Fax      +91 44 22523514
Prashanth P <prashanthp gmail.com>
Sent by: mp4-tech-bounces lists.mpegif.org
28/10/2023 07:31 PM
Please respond to Prashanth P
        To:     mp4-tech lists.mpegif.org
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        Subject:        [Mp4-tech] Bit rate and compression Ratio
Hi,
Questions:
1) what is the difference between data rate and compression ratio?
2) How to calculate the MIPS rate given the Processor Clock Frequency?
 Rgds
 Prashanth
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