HDCAM

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HDCAM and HDCAM SR: A quick guide

What is HDCAM?
- A high-definition video recording format for 1/2-inch videocassette tapes, introduced in 1997.
- Uses 8-bit DCT compression with 3:1:1 chroma subsampling.
- Recorded video at 144 Mbps on 1440×1080 content, playback is upsampled to 1920×1080.
- Audio: four AES3 channels at 20-bit, 48 kHz.
- Tape sizes come in small (Betamax-sized) and large formats.
- Standard: SMPTE 367M (also called SMPTE D-11).
- Image details: each frame has a 1920×1080 luminance channel and a 960×1080 chrominance channel; during compression, luminance is downsampled to 1440×1080 and chrominance to 480×1080 (3:1:1).
- Capable of 24p for film work; later models added 24p/23.976 PSF options.
- Not widely used today, but Sony continued producing new HDCAM tape stock into the mid-2020s.

What is HDCAM SR?
- A higher-end version introduced in 2003 and standardized as SMPTE 409M by 2005.
- Uses denser tape and records at much higher quality: 10-bit 4:2:2 or 4:4:4 RGB.
- Video bit rate around 440 Mbps, with a total data rate near 600 Mbps.
- Compression uses MPEG-4 Part 2 Simple Studio Profile.
- Supports up to 12 audio channels at 24-bit, 48 kHz, with AES3 data.
- Designed to capture more of the HD-SDI bandwidth (full 1920×1080).
- Some decks offer a 2× mode (up to about 990 Mbps) for single 4:4:4 stream or two 4:2:2 streams.
- 3D recording was supported on certain VTRs by pairing left/right eyes on a single tape.

Usage and decline
- HDCAM SR became a common master format for HDTV production in the mid-2000s, including many prime-time shows.
- After the 2011 Tōhoku earthquake damaged Sony’s factory that produced SR media, production slowed and eventually ceased.
- Production of HDCAM SR media stopped in 2023.
- HDCAM (the standard) has mostly faded from modern workflows, replaced by memory cards, disk-based formats, and SSDs.
- Sony continued to manufacture HDCAM tape stock for some time into the 2020s.

Tape details and other notes
- Runtime: S tapes up to 40 minutes; L tapes up to 124 minutes; 24p mode can extend runtimes to about 50 minutes (S) and 155 minutes (L).
- Physical colors: HDCAM tapes are black with an orange lid; HDCAM SR tapes are black with a cyan lid.
- Some HDCAM gear could playback older Betacam formats or be adapted to work with Digital Betacam, depending on the model.

See also
- Related formats and technologies in the history of video storage and HD recording.