[BC] Digital Interference

[Robert Orban]

At 06:57 PM 12/18/2005, you wrote:
>From: Rich Wood <richwood at pobox.com>
>Subject: Re: [BC] Digital Intgerference (was AM Interference)
>To: Broadcast Radio Mailing List <broadcast at radiolists.net>
>Message-ID: <7.0.0.16.2.20051218131028.076db8f0 at yahoo.com>
>Content-Type: text/plain; charset="us-ascii"; format=flowed
>
>------ At 11:06 AM 12/18/2005, Cornelius Gould wrote: -------
>
> >Are they using coded material on the Hard Drive system, or the STL (or 
> both)?
>
>Most stations I've seen don't use uncompressed files on their digital
>systems, even though disk space is incredibly cheap. Most I've seen
>use compressed digital STLs.
>
>Many stations receive spots and programming in MP3. I'm part of an
>MP3 distribution network called Radio-Studio.net. MP3 between 192 and
>320KBPS are very common sources. In Talk we use remote units that
>either use dialup at 33,300 or ISDN. Each uses a codec. Satellite
>delivery uses a codec.
>
>Essentially, what we're doing is replacing analog generational losses
>with codec losses. Analog losses are easier to accept. It's usually
>constant tape hiss that the ear gradually tunes out. Codec artifacts
>are transient and repeatedly call attention to themselves.

Good lossless coding can reduce bit rate and storage space by 50%. The 
industry should transition to it from lossy coding, and the sooner the better.

bob Orban