Both Panasonic and Sony released the first consumer AVCHD camcorders in spring of 2. Panasonic released the first AVCHD camcorder aimed at the professional market in 2. FLASH card consumer model rebadged with a different model number. Magix Movie Edit Pro 15 Plus Free Download Full Version' title='Magix Movie Edit Pro 15 Plus Free Download Full Version' />In 2. AVCHD specification was amended to include 1. AVCHD Progressive and stereoscopic video AVCHD 3. D. The new video modes require double the data rate of previous modes. AVCHD and its logo are trademarks of Sony and Panasonic. Overviewedit. File organization on Panasonic and Canon solid state AVCHD camcorders. For video compression, AVCHD uses the MPEG 4 AVCH. D video resolutions. For audio compression, it supports both Dolby AC 3 Dolby Digital and uncompressed linear PCM audio. Stereo and multichannel surround 5. Aside from recorded audio and video, AVCHD includes many user friendly features to improve media presentation menu navigation, simple slide shows and subtitles. The menu navigation system is similar to DVD video, allowing access to individual videos from a common intro screen. Slide shows are prepared from a sequence of AVC still frames, and can be accompanied by a background audio track. Subtitles are used in some camcorders to timestamp the recordings. Audio, video, subtitle, and ancillary streams are multiplexed into an MPEG transport stream and stored on media as binary files. Usually, memory cards and HDDs use the FAT file system, while optical discs employ UDF or ISO9. At the file system level, the structure of AVCHD is derived from the Blu ray Disc specification, but is not identical to it. In particular, it uses legacy 8. Blu ray Discs utilize long filenames this may be caused by the fact that FAT implementations utilizing long file names are patented by Microsoft and are licensed on a per unit sold basis7. Another difference is location of the BDMV directory, which contains media files. On a DVD based camcorder the BDMV directory is placed at the root level, as on the Blu ray Disc. On the HDD based Canon HG1. BDMV directory is located in the AVCHD directory, which is placed at the root level. Solid state Panasonic and Canon camcorders nest the AVCHD directory inside the PRIVATE directory. Following a standard agreed upon by many still camera manufacturers, solid state camcorders have a root level DCIM directory for still images. AVCHD is compatible with the Blu ray disc format2 and can be authored without re encoding on Blu ray discs or DVDs, though not all Blu ray Disc players are compatible with AVCHD video authored on DVD media, a format known as AVCHD disc. AVCHD recordings can be transferred to a computer by connecting the camcorder via the USB connection. Removable media like SDHC and Memory Stick cards or DVDs can be read on a computer directly. Copying files from an AVCHD camcorder or from removable media can be performed faster than from a tape based camcorder, because the transfer speed is not limited by realtime playback. Just as editing DVCPRO HD and HDV video once demanded an expensive high end computer, AVCHD editing software requires powerful machines. Compared to HDV, AVCHD requires 2 4x the processing power for realtime playback, placing a greater burden on the computers CPU and graphics card. Improvements in multi core computing and graphics processor acceleration bring AVCHD playback to mainstream desktops and laptops. Video formatsedit. An example of interlace combing. AVCHD supports a variety of video resolutions and scanning methods, which was further extended with the 2. The licensing body of the specification defines a variety of labels for products compliant with specific features. Most AVCHD camcorders support only a handful of the video and audio formats allowed in the AVCHD standard. Interlaced videoeditAVCHD supports both standard definition AVCHD SD and high definition AVCHD 1. AVCHD 1. 08. 0i is available on most AVCHD camcorders. For some models this is the only recording mode offered. AVCHD SD is used in the shoulder mount Panasonic HDC MDH1,1. North American AG AC7 cousin. A successor model the AG AC8, is also capable of recording in AVCHD SD mode. Several models from JVC like the consumer camcorders GZ HM6. GZ HM6. 70 and GZ HM6. JVC GY HM7. 01. AVCHD SD video. AVCHD SD is not compatible with consumer DVD players, because it employs AVC video encoding instead of MPEG 2 Part 2. AVCHD SD can be played on a Blu ray Disc player without re encoding. Interlaced video had been originally designed for watching on a cathode ray tube television set. Material recorded for interlaced presentation may exhibit combing or ghosting when it is rescaled, filmed out or watched on a computer or another progressive scan device without proper deinterlacing. Some AVCHD 1. 08. In particular, Progressive segmented frame Ps. F is utilized in some Panasonic 2. Digital Cinema, Canon PF2. PF3. 0 and Sony camcorders. The 2 3 pulldown technique is used in some 6. Hz versions of Canon PF2. Panasonic 2. 4p Digital Cinema camcorders for recording 2. Most editing tools treat progressive video recorded within an interlaced stream as interlaced, though some editing systems and most standalone Blu ray Disc players are capable of recognizing the pulldown pattern to recover the original frames using the process known as inverse telecine. Progressive scan videoedit. Native Progressive logo CanonSince the very beginning, the AVCHD specification had supported 7. Hz models and 5. 0 framess for 5. Hz models. Frame rates of 2. Many of the digital compact cameras made by Panasonic, such as the DMC ZS3DMC TZ7, DMC FT1, DMC FZ3. DMC FZ3. 8, and DMC ZS 7TZ 1. AVCHD Lite see below. Until the advent of AVCHD Progressive mode, native progressive scan video for 1. In 2. 01. 0, Panasonic introduced a new lineup of consumer AVCHD camcorders with 1. Panasonic advised that not all players that support AVCHD playback could play 1. In 2. 01. 1, this mode was officially included into the AVCHD specification as part of 2. AVCHD Progressive. This mode uses the same AVCHD folder structure and container files for storing video, with the maximum bitrate of 2. Mbits. In 2. 01. Sony introduced consumer and professional AVCHD models capable of AVCHD Progressive recording. In 2. 01. 2 JVC announced the GY HMQ1. AVCHD Progressive video. Audio formatseditMost AVCHD camcorders record audio using Dolby Digital AC 3 compression scheme. Stereo and multichannel audio is supported. Audio data rate can range from 6. In practice, data rates of 2. Some professional models allow recording uncompressed linear PCM audio. Digital Environment Workflow Dvd 10. AVCHD specification allows using recordable DVDs, memory cards, non removable solid state memory and hard disk drives as recording media. Conventional 1. 2 cm disc left compared to 8 cm disc rightWhen the AVCHD standard was first announced, recordable DVD was the only recording medium. To reduce camcorder size, manufacturers opted for an 8 cm disc, sometimes called mini. DVD. Recording capacity of an 8 cm disc ranges from 1. GB for a single sided single layer disc to 5. GB for a double sided double layer disc. Pros DVDs are familiar to most consumers, thus considered user friendly. Recordable DVDs are relatively cheap. Recorded disc can be played back in most Blu ray Disc players. Discs can be used for long term storage of recorded video. Cons Some argue that the longevity of recordable DVDs may be shorter than expected. Rewritable DVDs cost more than write once discs. DVDs must be finalized to play back on set top players though DVD RWs can be unfinalized again.