ALL Dash Cams Have Distortion- "Bending Images"

Nigel said:
It's a dashcam, it does 30fps, another historical legacy of older dashcams supporting NTSC/PAL video output. Although 30 is a sensible frame rate for an accident cam.
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Thank you. We believe the 30 fps is pretty much standardized. The 60 fps is supposedly for fast motion but we see no positive results here. Watched many frames comparing the two, and it is like comparing similar colors (un-distinguishable). Your take.
 
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synoptic12 said:
P.S. - Would it make any sense to enlarge the mic opening, for possibly better sound?
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No, used in my car it needs the sound level reduced not increased. There appears to be no volume control even of the auto variety and it seems to be set a little too sensitive for the sound levels in my car when accelerating hard.
 
Nigel said:
No, used in my car it needs the sound level reduced not increased. There appears to be no volume control even of the auto variety and it seems to be set a little too sensitive for the sound levels in my car when accelerating hard.
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Thank you. I must have misconstrued the defect regarding amplification. I thought it was the other way around.
 
synoptic12 said:
Thank you. I must have misconstrued the defect regarding amplification. I thought it was the other way around.
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There may be some variation, not sure as there have not been many comments on the sound. I think mine would be fine in a Lexus, but I have it in an MG.

Might also help if the microphone picked up more noise from the cabin and less directly from the windscreen - ie have a directional microphone pointed at the cabin. Mine seems rather good at picking up engine noise at the expense of cabin noise.
 
Nigel said:
There may be some variation, not sure as there have not been many comments on the sound. I think mine would be fine in a Lexus, but I have it in an MG.

Might also help if the microphone picked up more noise from the cabin and less directly from the windscreen - ie have a directional microphone pointed at the cabin. Mine seems rather good at picking up engine noise at the expense of cabin noise.
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When you speak of 'noise', are you referring to sound ( sensitivity) ? In electronics, if any refer to "noise" it would be a given as a negative value. I would believe that the terminology 'noise' which you refer to is sound. I was not aware ( speaking of sound amplification), that the windscreen, or windshield would magnify audible signals from the mic. Is it that sensitive? I would tend to believe that a Lexus is much quitier than an MG, and in that respect would not the sensitivity be more amplified?
 
Nigel said:
There may be some variation, not sure as there have not been many comments on the sound. I think mine would be fine in a Lexus, but I have it in an MG.

Might also help if the microphone picked up more noise from the cabin and less directly from the windscreen - ie have a directional microphone pointed at the cabin. Mine seems rather good at picking up engine noise at the expense of cabin noise.
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Do you have GPS?
 
synoptic12 said:
When you speak of 'noise', are you referring to sound ( sensitivity) ? In electronics, if any refer to "noise" it would be a given as a negative value. I would believe that the terminology 'noise' which you refer to is sound. I was not aware ( speaking of sound amplification), that the windscreen, or windshield would magnify audible signals from the mic. Is it that sensitive?
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I was writing in English, not American! Yes by "noise" I mean audio within the cabin that I want recorded.

The level of engine sound recorded compared to cabin sound is not what I hear when in the car. I suspect that engine sound travels through the glass into the mount and then into the camera and its circuit board and finally into the microphone itself. The microphone wont be able to tell the difference between pressure waves in the air and pressure waves in itself. Everything in the camera and mount is firmly connected.

synoptic12 said:
I would tend to believe that a Lexus is much quitier than an MG, and in that respect would not the sensitivity be more amplified?
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A Lexus would have a lot less engine sound in the cabin and a little less road/wind sound - I don't have double glazed windows.

synoptic12 said:
Do you have GPS?
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Yes.
 
Nigel said:
I was writing in English, not American! Yes by "noise" I mean audio within the cabin that I want recorded.

The level of engine sound recorded compared to cabin sound is not what I hear when in the car. I suspect that engine sound travels through the glass into the mount and then into the camera and its circuit board and finally into the microphone itself. The microphone wont be able to tell the difference between pressure waves in the air and pressure waves in itself. Everything in the camera and mount is firmly connected.


A Lexus would have a lot less engine sound in the cabin and a little less road/wind sound - I don't have double glazed windows.


Yes.
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Could the GPS interfere with the sine wave, causing "noise"?
 
synoptic12 said:
Could the GPS interfere with the sine wave, causing "noise"?
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When you speak of 'double glazed', is that safety glass you are referring to? I know that you write in English, but "noise" is a very poor choice to denote 'sound, or sound quality'.
 
synoptic12 said:
When you speak of 'double glazed', is that safety glass you are referring to? I know that you write in English, but "noise" is a very poor choice to denote 'sound, or sound quality'.
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Double glazed means two layers of glass with a gap between as used by Lexus to reduce noise in the cabin.

We always refer to engine noise rather than engine sound, even though in an MG that noise is wanted and provides the car with it's character.
 
synoptic12 said:
Could the GPS interfere with the sine wave, causing "noise"?
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What sine wave?

The clock frequency of the processor is not far off GPS radio frequencies so I don't think it would be possible to tell the source of any noise in the audio, it does sound like radio transmissions rather than random noise though, similar to what you get if you use a mobile phone near a microphone.
 
Nigel said:
What sine wave?

The clock frequency of the processor is not far off GPS radio frequencies so I don't think it would be possible to tell the source of any noise in the audio, it does sound like radio transmissions rather than random noise though, similar to what you get if you use a mobile phone near a microphone.
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We don't believe that the processor would generate any distracting signal, unless it was a cheap build. Radio frequencies vary in amplitude modulation, as opposed to frequency modulation. AM would be far more prone to muddy up the signal. FM is a cleaner signal. If this were true, a small filter could overcome the transient 'noise'. However, the GPS is a concerning factor, relating to frequency. Not that much versed with satellite signals. If GPS does maintain similar properties, it would stand to reason the after effects i.e. 'noise'. This is why I asked you if you had GPS, as you do. Do you know of any without GPS experiencing these issues?
 
Nigel said:
Double glazed means two layers of glass with a gap between as used by Lexus to reduce noise in the cabin.

We always refer to engine noise rather than engine sound, even though in an MG that noise is wanted and provides the car with it's character.
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Yes, that is somewhat understandable. "Noise" is a double standard word and confusing, whereas using the general term out of context can lead to a mixed message. As being in the electronic field, "Noise" is just that 'Noise', used in conjunction with "White Noise". Not any in this arena would refer 'noise' as being the same as 'sound'. The English have somewhat different terminology which can be adrift at times. In the norm, we can overcome such distractions, per say. For instance, English call windshields, "windscreens", the U.S. we apply the term 'windshield'. The English write "Organise", the U.S. ("Organize). I've seen this numerous times, so I don't believe that they are all typographical errors. This is mere triviality.
 
synoptic12 said:
We don't believe that the processor would generate any distracting signal, unless it was a cheap build. Radio frequencies vary in amplitude modulation, as opposed to frequency modulation. AM would be far more prone to muddy up the signal. FM is a cleaner signal. If this were true, a small filter could overcome the transient 'noise'. However, the GPS is a concerning factor, relating to frequency. Not that much versed with satellite signals. If GPS does maintain similar properties, it would stand to reason the after effects i.e. 'noise'. This is why I asked you if you had GPS, as you do. Do you know of any without GPS experiencing these issues?
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Just listened to the firework display I recorded last week, the camera was not plugged into the GPS. However even if I turn up the volume so the bangs are deafening I can't hear any electronic noises above the background sound of the crowd, waves on the beach, someone in the distance playing an accordion etc. I guess it has a pretty good S/N ratio, it is lacking a little clarity when recording acoustic music, presumably due to the microphone being hidden inside the case. Biggest issue is lack of a volume control. From what I remember, if I record using battery power in the quiet of my living room then there is a little electronic noise even without the GPS, there may be more with the GPS though.
 
The 0803 will support and format a 32gb sd memory card.
 
David106 said:
The 0803 will support and format a 32gb sd memory card.
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It certainly supports it for writing, as it does a 64GByte card, and it will attempt to format it. However I suspect it only succeeds in formatting it if it was already formatted and even then you may only end up with 8GByte usable...
 
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