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MPEG Standards.
Know What Video
Format to Choose:
MPEG-2 or MPEG-4?
www.captioningstar.com
MPEG
Motion Picture Experts Group (MPEG) has defined a set of
standards for video and audio compression coding and
multimedia delivery since the early 1990s. The
compression ratio achieved with MPEG encoding is the
ideal standard for digital video data delivery. MPEG
standards do not specify the operation of the encoder
but allow encoder implementations to improve over time.
Hence, various features have been added from one
profile to another, aiming to increase its complexity and
efficiency. Here are a few MPEG standards that have
allowed enormous innovation while maintaining their
interoperable standard. These standards would guide
you in selecting the desired video format
www.captioningstar.com
www.captioningstar.com
MPEG started developing coding formats in 1992. It first
defined the MPEG-1 coding format that was commonly
applied to Video-CD and low-quality video on DVD
Video. It was also used in digital satellite/ cable TV
services before MPEG-2 Codex was introduced.
MPEG-1 downsamples the images to meet the low-bit
requirement and uses only 24-30 Hz, resulting in
moderate quality videos. Also, MPEG-1 was designed
for coding progressive video at a transmission rate of
around 1.5 million bits per second. The popular MPEG-1
audio layer III (MP3) audio compression is included in
this format, which compresses a sound sequence to a
smaller file preserving the original audio quality.
MPEG 1
MPEG 2
MPEG-2 is considered to be the enhanced MPEG-1
format in terms of quality used for DVD productions.
This standard was created to encode high-quality
videos by coding interlaced images at transmission
rates over 4 million bits per second. This codec was
developed in 1994 and is commonly applied to digital
television broadcasts, Video on Demand, DVD, VCD, and
similar discs. It generally uses lossy compression
techniques to reduce file sizes for audio and video files
substantially.
MPEG-2 encoded video files are much bigger and
require a lot more bandwidth for streaming. In
addition, with a few enhancements, MPEG-2 Video and
Systems are also used in some HDTV transmission
systems and are considered to be the standard format
for over-the-air ATSC digital television. The MPEG-2
players can handle MPEG-1 data as well.
www.captioningstar.com
www.captioningstar.com
MPEG 3
The Moving Picture Experts Group (MPEG) also developed
a set of audio and video coding standards known as
MPEG-3 that can handle HDTV signals at 1080p in the 20
to 40 megabits per second range. While MPEG-2 was
being developed, an attempt was made with MPEG-3 to
address the requirement for an HDTV standard. However,
it soon became clear that HDTV could be supported by
MPEG-2 at high data rates. As a result, MPEG-3 was
incorporated into MPEG-2 in 1992, and HDTV was added
as a separate profile.
www.captioningstar.com
MPEG 4
MPEG-4, created in 1998, is the latest audio/video
compression method by the MPEG group that is
specifically designed for low-bandwidth (less than 1.5
Bit/sec bitrate) video/audio encoding while providing
superior audio and video quality compared to MPEG-2
format. It is designed to deliver DVD-quality video
(MPEG-2 format) at lower data rates and smaller file
sizes. The MPEG-4 is an encoding method for portable
devices like media players and mobile phones and
online stores that hire video and audio files.
Though MPEG-4 absorbs many features from MPEG-1
and MPEG-2, it is very different in focus from these
standards as it focuses on multimedia and interactivity.
The MPEG-4 standard tackles the creation and
definition of the media items in a multimedia
presentation, their synchronization and relationship
during transmission, and how users can interact with
the media objects. In simple terms, the visual scenes
are broken down into objects to be sent as separate
layers, which are then composed at the decoder. In
general, MPEG-4 is a far more versatile encoding format
than MPEG-2
www.captioningstar.com
Looking for a suitable
format for your videos?
MPEG-2 or MPEG-4
We had discussed the various MPEG standards for video
compression and multimedia delivery. Thus, the most
commonly used formats are MPEG-2 and MPEG-4. Learn
the differences between MPEG-2 and MPEG-4 before
selecting a format for your videos.
www.captioningstar.com
www.captioningstar.com
Read our interesting case with an award-winning
Marketing and Advertising agency.
The customer wanted to embed CEA- 708 closed
captions to her MPEG-2 video commercial ads, but we
had to keep her TV station requirements in mind before
working on it. There were a few constraints in adding
captions to MPEG-2 files. We then decided to convert
them into MPEG-4 to embed 708 captions as per
requirement.
Come up with your captioning requirements, and we
would suggest you the required video format. In case
you have your videos ready, let us suggest you the
captioning formats
www.captioningstar.com
CaptioningStar, one of the top companies in the United
States, offers reliable captions to videos encoded in any
format. Also, enabling captions to videos is mandatory
by law. Our services are strictly compliant with ADA and
FCC guidelines. According to ADA, Title IV, all telephone
and internet service companies must make their
products and services accessible to people with
disabilities such as hearing loss and visual impairments.
This accommodates supporting visuals or video content
with appropriate captions.
Also, the FCC established closed captions mandatory
for all video programs, especially news, entertainment,
and information to all individuals who are deaf or hard
of hearing. Thus all Video programming Distributors
(VPDs)- cable operators, broadcasters, satellite
distributors, and other multi-channel video
programming distributors caption all their TV programs.
We ensure captions are accurate, synchronous,
complete, and correctly placed.
We add sidecar files for all MPEG video container
formats and CEA- 608 and CEA-708 embedded captions
for your library of videos and broadcasts. We don’t limit
our captioning services to these formats but
accommodate any format of your choice. Contact us
with your video specifications or TV station
requirements and we absolutely add and sync captions.
www.captioningstar.com
THANK YOU
108-44 63rd Rd, Queens, NY 11375
(707) 200-4628
info@captioningstar.com

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MPEG Standards. Know What Video Format to Choose MPEG-2 or MPEG-4.pdf

  • 1. MPEG Standards. Know What Video Format to Choose: MPEG-2 or MPEG-4? www.captioningstar.com
  • 2. MPEG Motion Picture Experts Group (MPEG) has defined a set of standards for video and audio compression coding and multimedia delivery since the early 1990s. The compression ratio achieved with MPEG encoding is the ideal standard for digital video data delivery. MPEG standards do not specify the operation of the encoder but allow encoder implementations to improve over time. Hence, various features have been added from one profile to another, aiming to increase its complexity and efficiency. Here are a few MPEG standards that have allowed enormous innovation while maintaining their interoperable standard. These standards would guide you in selecting the desired video format www.captioningstar.com
  • 3. www.captioningstar.com MPEG started developing coding formats in 1992. It first defined the MPEG-1 coding format that was commonly applied to Video-CD and low-quality video on DVD Video. It was also used in digital satellite/ cable TV services before MPEG-2 Codex was introduced. MPEG-1 downsamples the images to meet the low-bit requirement and uses only 24-30 Hz, resulting in moderate quality videos. Also, MPEG-1 was designed for coding progressive video at a transmission rate of around 1.5 million bits per second. The popular MPEG-1 audio layer III (MP3) audio compression is included in this format, which compresses a sound sequence to a smaller file preserving the original audio quality. MPEG 1
  • 4. MPEG 2 MPEG-2 is considered to be the enhanced MPEG-1 format in terms of quality used for DVD productions. This standard was created to encode high-quality videos by coding interlaced images at transmission rates over 4 million bits per second. This codec was developed in 1994 and is commonly applied to digital television broadcasts, Video on Demand, DVD, VCD, and similar discs. It generally uses lossy compression techniques to reduce file sizes for audio and video files substantially. MPEG-2 encoded video files are much bigger and require a lot more bandwidth for streaming. In addition, with a few enhancements, MPEG-2 Video and Systems are also used in some HDTV transmission systems and are considered to be the standard format for over-the-air ATSC digital television. The MPEG-2 players can handle MPEG-1 data as well. www.captioningstar.com
  • 5. www.captioningstar.com MPEG 3 The Moving Picture Experts Group (MPEG) also developed a set of audio and video coding standards known as MPEG-3 that can handle HDTV signals at 1080p in the 20 to 40 megabits per second range. While MPEG-2 was being developed, an attempt was made with MPEG-3 to address the requirement for an HDTV standard. However, it soon became clear that HDTV could be supported by MPEG-2 at high data rates. As a result, MPEG-3 was incorporated into MPEG-2 in 1992, and HDTV was added as a separate profile.
  • 6. www.captioningstar.com MPEG 4 MPEG-4, created in 1998, is the latest audio/video compression method by the MPEG group that is specifically designed for low-bandwidth (less than 1.5 Bit/sec bitrate) video/audio encoding while providing superior audio and video quality compared to MPEG-2 format. It is designed to deliver DVD-quality video (MPEG-2 format) at lower data rates and smaller file sizes. The MPEG-4 is an encoding method for portable devices like media players and mobile phones and online stores that hire video and audio files. Though MPEG-4 absorbs many features from MPEG-1 and MPEG-2, it is very different in focus from these standards as it focuses on multimedia and interactivity. The MPEG-4 standard tackles the creation and definition of the media items in a multimedia presentation, their synchronization and relationship during transmission, and how users can interact with the media objects. In simple terms, the visual scenes are broken down into objects to be sent as separate layers, which are then composed at the decoder. In general, MPEG-4 is a far more versatile encoding format than MPEG-2
  • 7. www.captioningstar.com Looking for a suitable format for your videos? MPEG-2 or MPEG-4 We had discussed the various MPEG standards for video compression and multimedia delivery. Thus, the most commonly used formats are MPEG-2 and MPEG-4. Learn the differences between MPEG-2 and MPEG-4 before selecting a format for your videos.
  • 9. www.captioningstar.com Read our interesting case with an award-winning Marketing and Advertising agency. The customer wanted to embed CEA- 708 closed captions to her MPEG-2 video commercial ads, but we had to keep her TV station requirements in mind before working on it. There were a few constraints in adding captions to MPEG-2 files. We then decided to convert them into MPEG-4 to embed 708 captions as per requirement. Come up with your captioning requirements, and we would suggest you the required video format. In case you have your videos ready, let us suggest you the captioning formats
  • 10. www.captioningstar.com CaptioningStar, one of the top companies in the United States, offers reliable captions to videos encoded in any format. Also, enabling captions to videos is mandatory by law. Our services are strictly compliant with ADA and FCC guidelines. According to ADA, Title IV, all telephone and internet service companies must make their products and services accessible to people with disabilities such as hearing loss and visual impairments. This accommodates supporting visuals or video content with appropriate captions. Also, the FCC established closed captions mandatory for all video programs, especially news, entertainment, and information to all individuals who are deaf or hard of hearing. Thus all Video programming Distributors (VPDs)- cable operators, broadcasters, satellite distributors, and other multi-channel video programming distributors caption all their TV programs. We ensure captions are accurate, synchronous, complete, and correctly placed. We add sidecar files for all MPEG video container formats and CEA- 608 and CEA-708 embedded captions for your library of videos and broadcasts. We don’t limit our captioning services to these formats but accommodate any format of your choice. Contact us with your video specifications or TV station requirements and we absolutely add and sync captions.
  • 11. www.captioningstar.com THANK YOU 108-44 63rd Rd, Queens, NY 11375 (707) 200-4628 info@captioningstar.com