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TV Test Patterns: What They Show and How to Use Them

A test pattern is trustworthy only when its digital values, playback path, television state, and intended question are known. Use each pattern for one defined check, then verify the complete signal path.

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Direct answer

In brief

A test pattern is useful only when the pattern values, delivery path, television state, and intended question are known. Confirm the format, range, colorimetry, bit depth, metadata, resolution, picture mode, input, scaling, and room before changing a control. Use format-specific patterns for SDR, PQ, HLG, HDR10+, and gaming, then verify that the full result improved rather than trusting a familiar-looking image or one slider response.

Test patterns isolate one part of the video system.

They are useful only when the pattern, playback path, television state, and intended question are known.

A perfect-looking pattern from an unknown source can be wrong.

A correct pattern can also look wrong because the player or television changed it.

The practical answer

Before moving a control, confirm:

Change one control.

Then verify that the complete result improved.

A six-stage test-pattern trust chain moves from authored pattern values through a player or application, operating system or GPU, HDMI or decoder path, television mode, and panel light. Risk labels identify range, scaling, color management, chroma conversion, transfer function, metadata, and picture processing. The diagram states that a recognizable pattern is not proof that its digital values survived.
A test pattern is interpretable only when the authored values and complete playback path are known.

Pattern validity checklist

A documented pattern should identify:

When those details are absent, use the pattern only for a coarse check.

A decision tree begins with the question What behavior are you checking and branches to black, white, grayscale, EOTF, color, resolution, motion, and HDR. Each branch names a suitable pattern family and a warning says one pattern should answer one defined question rather than support broad conclusions.
Pattern selection should follow the specific behavior being tested, with separate pattern families for distinct signal and display questions.

Choose the delivery path

UHD Blu-ray

Advantages can include:

The player can still change:

Blu-ray or AVCHD

Useful for SDR BT.709 patterns. [4]

Confirm:

USB media file

Useful when the file and player are documented.

Confirm:

Internal application

Useful for testing the application path.

The application can use a separate picture memory and decoder.

Streaming platform

Useful for testing the platform path.

Do not assume the platform stream is byte-for-byte identical to the upload.

YouTube processes uploaded video and can generate both HDR and SDR versions. [14]

Computer or browser

Useful for:

Validate:

Prepare the room

Use the room condition associated with the mode.

Reference-oriented SDR

Control direct screen light and reflection.

BT.2035 defines a repeatable professional HDTV environment. [16]

A home can approximate its principles.

HDR

BT.2100-3 specifies a neutral D65 surround, low surround luminance, and no light falling on the screen for critical viewing. [2]

Day mode

Use the normal brighter-room condition when checking a separate day mode.

Do not use a dark-room PLUGE result to define every daytime preference.

Stabilize the path

There is no universal warm-up time.

For a visual check, allow the television and player to reach normal operation.

For measurement:

  1. Display a stable patch.
  2. Repeat luminance and chromaticity readings.
  3. Begin when drift is acceptable for the required accuracy.

Confirm that:

Confirm the active state

Before the first pattern, record:

For the project Samsung television, the established preparation remains:

Menus can change with firmware.

Framing, overscan, and aspect ratio

Use a framing pattern before single-pixel tests.

What it shows

What to look for

ITU-R BT.1729 defines a digital television reference pattern for luminance, chrominance, and format checks. [5]

Spears & Munsil documents framing and overscan checks in its technical notes. [17]

Native resolution

Use a native-resolution pattern for:

Use a lower-resolution video pattern when testing how the television scales that normal source.

Label the purpose.

A split comparison shows native one-to-one pixel mapping on the left and a 1920 by 1080 source scaled to a 3840 by 2160 panel on the right. The native side is labeled for pixel mapping, one-pixel detail, sharpness, and chroma text. The scaling side is labeled for evaluating normal HD-to-4K scaling. A warning says a scaled pattern is valid for a scaling question but not for one-to-one pixel judgment.
One-to-one pixel tests require native mapping, while a lower-resolution pattern can validly evaluate the television’s normal scaling path.

SDR PLUGE

PLUGE checks the black threshold under a defined viewing condition.

ITU-R BT.814-4 covers SDR, PQ, and HLG PLUGE procedures. [1]

What it can contain

Depending on the pattern:

Before adjustment

Confirm:

What to look for

Follow the exact pattern instructions.

The general SDR objective is:

BT.814 describes adjusting the black-level control so the blackest stripe just disappears while the brighter stripe remains visible. [1]

If below black is visible

Possible causes include:

Do not diagnose from one cause alone.

If above black is missing

Possible causes include:

PLUGE on different backgrounds

Use:

The television may change black behavior with average picture level.

Spears & Munsil documents multiple PLUGE variants for this reason. [9]

A conceptual SDR PLUGE diagram shows four labeled regions: slightly darker than reference black, reference black, slightly brighter than black, and a brighter surround region. The intended viewing result is that the darkest specified region disappears while the brighter specified region remains visible. The diagram warns that commercial PLUGE layouts vary and the exact pattern instructions control interpretation.
PLUGE uses black, darker-than-black, and lighter-than-black relationships under defined viewing conditions, but commercial layouts are not one universal three-bar design.

PQ and HLG PLUGE

Use a pattern authored for the active HDR system.

BT.2100-3 says that, for PQ in a non-reference viewing environment and for HLG, black level should be adjusted using the BT.814 PLUGE procedure. [2]

Do not use an SDR PLUGE file while forcing the display into HDR.

A diagnostic tree starts with PLUGE does not match the documented result and branches to control state, source and display range, upstream clipping, room and reflection, local dimming or processing, and panel near-black limits. The final step is to verify the signal path before moving the television black-level control.
Unexpected PLUGE behavior can arise anywhere in the signal chain and should not be diagnosed as one slider error without path checks.

Near-black step pattern

What it shows

What to look for

Use measurement when exact luminance matters.

SDR white and clipping

A high-level pattern checks whether bright signal levels remain distinct.

Encoding

The pattern documentation must state:

The familiar 8-bit values above code 235 are not universal.

What to look for

Spears & Munsil’s SDR contrast pattern includes above-reference bars and explains that a player or display can clip them upstream. [10]

Reference white versus headroom

Decide whether the target workflow is intended to:

Record that decision.

Do not require every display to reveal every value through maximum code.

A horizontal SDR code-range concept separates black, nominal reference white, above-white headroom, and maximum digital code. Three workflow cards show preserving selected headroom, mapping headroom, or clipping at nominal white. A note states that the correct behavior depends on the declared encoding and workflow and that every display is not required to show every value through maximum code.
Nominal reference white and above-white headroom are distinct, and the desired treatment depends on the declared encoding and workflow.

Set SDR luminance separately

Use the panel-light control to set the chosen SDR white luminance when available.

Then use Contrast to check:

A clipping pattern does not define the preferred room brightness.

RGB clipping

Use separate red, green, and blue ramps or bars.

What it shows

What to look for

A two-panel clipping comparison shows a white-step pattern where all bright neutral steps remain distinct and a separate RGB test where the red channel flattens early while green and blue continue increasing. The diagram explains that visible white steps do not prove that each color channel retains headroom.
Combined white separation does not prove that red, green, and blue preserve the same high-level headroom.

Grayscale fields

Use several levels, such as:

The exact signal levels should be stated.

Visual use

A field can reveal:

Measurement use

A meter can establish:

A field cannot establish D65 by eye.

Do not call every middle field “50 percent brightness”

State whether the patch is:

Nonlinear SDR and HDR signals do not make these equivalent.

A conceptual nonlinear EOTF graph plots normalized signal on the horizontal axis and emitted luminance on the vertical axis. A marker at 50 percent signal lands well below 50 percent luminance, while a dashed linear reference reaches the midpoint. Labels say that 50 percent signal, 50 percent code, 50 percent linear light, and 50 percent luminance are not interchangeable.
Nonlinear television transfer functions make signal level, code value, linear light, and display luminance different quantities.

Visual EOTF patterns

Some patterns compare a solid patch with a spatial mixture.

They can give a coarse visual indication when:

Stop when the checker is visible as structure

If the checkerboard:

do not interpret the brightness match.

A valid-versus-invalid comparison shows a checkerboard visual EOTF pattern at native mapping and intended viewing distance on the left, and a scaled pattern with moiré and visible checker structure on the right. The valid side is labeled authored target, optical blend, no zoom, and no visible structure. The invalid side is labeled scaling, sharpening, moiré, and compression. A warning says not to interpret a brightness match when the checker remains visible as structure.
Visual checkerboard comparisons require authored values, appropriate mapping, optical blending, and no visible structure; they do not verify the complete EOTF.

Meter-based EOTF patterns

Use a documented series of windows.

SDR

Measure against:

PQ

Measure target and actual cd/m².

HLG

State:

Three visual patches do not replace the series.

SDR color bars

Use the pattern version intended for the signal. [6]

Examples include:

Do not use a screenshot of bars from an unknown site.

Blue-only procedure

Preferred method

Use the television’s true blue-only mode when available.

Filter method

Validate the filter first.

Spears & Munsil says red, green, and yellow must become fully black under the selected filter strength before the filter is used. [11]

Comparison colors

With a valid blue-only procedure, compare:

The exact bars and reference patches depend on the pattern.

Adjustments

A documented pattern can guide coarse adjustment of:

Iterate because controls can interact.

A blue-only color-bar diagram separates comparison colors from filter-validation colors. Blue, white, cyan, and magenta remain as comparison regions under a valid blue-only procedure. Red, green, and yellow are shown as rejected to black for filter validation. A note says the exact reference patches depend on the specific SMPTE, ITU, or commercial pattern and that the method is only a coarse color and tint check.
A valid blue-only procedure compares blue-related reference regions while red, green, and yellow rejection verifies the filter or channel isolation.

Blue-filter limits

The result does not verify:

Use a meter for those questions.

Three conceptual spectral panels labeled LED LCD, WOLED, and QD-OLED show different display emission shapes. Each passes through the same illustrative blue filter. The LED LCD panel shows acceptable non-blue rejection, while the WOLED and QD-OLED panels show different leakage risks. The diagram states that a filter name or blue appearance is not a universal validation and that the test is whether required non-blue components are suppressed on the exact display.
Optical filter performance depends on the display spectrum, so a generic blue gel or named filter cannot be assumed valid across LED LCD, WOLED, and QD-OLED.

HDR color bars

ITU-R BT.2111-3 defines current HDR color-bar patterns for PQ and HLG. [3]

Use them for:

Do not interpret them as ordinary SDR RP 219 bars.

Saturation sweeps

What they show

A display can hit the primary endpoint and miss intermediate values.

Expanded color patches

Use:

These require measurement.

They are not adjusted one patch at a time through a six-axis CMS.

Color-volume patterns

For HDR, sample colors at several luminance levels.

Record:

A CIE triangle alone does not show color volume.

Sharpness pattern

Spears & Munsil describes a sharpness pattern with lines, circles, and diagonals used to identify halos, ghost lines, ringing, and stairstepping. [12]

Before adjustment

Confirm:

What to look for

Find neutral

Move the Sharpness control through its range.

Find the region that adds the least visible alteration.

The neutral number can be:

Do not copy a number from another model.

A split diagram compares artificial sharpness with genuine resolved detail. The sharpness panel shows one source edge with bright and dark halos and ringing. The resolution panel shows distinct line pairs that remain separately resolved without added outlines. A warning states that stronger edge contrast can look sharper while containing no additional source detail.
Sharpness can add halos, ringing, and false outlines without restoring source detail; neutral control values remain model- and path-specific.

Resolution pattern

Use bursts, lines, wedges, and zone plates to inspect:

Do not equate a more contrasty burst with more true detail.

Chroma-resolution pattern

Use colored text or alternating chroma structures to inspect:

The expected result changes with the authored format.

Color-space evaluation

Compare player output modes with the same documented pattern.

Spears & Munsil provides a combined color-space evaluation pattern for this purpose. [8]

Test:

Choose the path with the fewest avoidable errors for the intended use.

Three conceptual chroma-resolution panels show 4:4:4 with luma and chroma samples at every pixel, 4:2:2 with chroma shared horizontally, and 4:2:0 with chroma sampled less densely before reconstruction. Each panel includes colored text edges showing increasing reconstruction softness. A note says the expected result depends on the authored format, chroma siting, decoder, and intended use.
Chroma patterns can reveal sampling, siting, upsampling, conversion, and colored-edge artifacts; expected results depend on the authored signal and decoder.

Grayscale ramp

What it shows

What to look for

Color ramps

Use:

They can reveal CMS damage that isolated patches miss.

HDR highlight ramp

Use a ramp extending through:

Record metadata and target luminance.

Four conceptual ramp panels show smooth output, visible banding, hard clipping, and a colored tint developing across a grayscale ramp. A second row shows red, green, blue, cyan, magenta, and yellow color ramps. The diagram says ramps reveal discontinuities and artifacts that isolated patches can miss.
Grayscale and color ramps can reveal banding, posterization, clipping, tint, hue discontinuity, and processing artifacts across a continuous range.

Uniformity fields

Use full-screen fields at several levels.

What they show

Procedure

Motion patterns

No single pattern describes all motion.

Use separate tests for:

Six motion-test categories are arranged around a central statement that no single motion pattern answers every question. The categories are cadence, frame delivery, persistence, pixel response, interpolation, and variable refresh rate. Each card lists the behavior isolated by that category. A warning says interpolation off does not prove correct frame pacing or response behavior.
Motion artifacts can arise from cadence, frame delivery, persistence, pixel response, interpolation, and VRR, so one pattern or one control state is insufficient.

Film cadence

Use a documented 23.976 or 24 fps pattern.

The amount of visible judder depends on:

Use it to compare modes, not to demand one universal appearance.

Frame-drop pattern

A numbered or marked frame sequence can show:

Use a camera only when the method is documented and shutter interaction is understood.

Persistence and ghosting

TestUFO provides browser-based motion, persistence, and ghosting demonstrations. [15]

Confirm:

The result describes the browser path.

A scope diagram places TestUFO inside a browser, computer, GPU, and display path. Teal cards show that it can test browser frame delivery, refresh comparison, persistence, ghosting, black-frame insertion, and browser-path timing. Coral cards show that it does not directly test a television internal application, Blu-ray player path, HDR tone mapping, console pipeline, or film cadence from another source.
TestUFO provides browser-based frame-rate, persistence, ghosting, timing, and related motion tests, but results describe the browser, computer, compositor, GPU, and display path.

Motion interpolation

Compare:

Look for:

Off does not guarantee correct frame delivery.

VRR

Test:

Look for:

Three separate test-pattern branches compare SDR, PQ, and HLG. SDR uses BT.709 context, SDR PLUGE, clipping and declared EOTF. PQ uses absolute luminance, approximately 58 percent PQ for 203 candelas per square metre HDR Reference White under the stated production reference, and tone-mapping tests. HLG uses nominal peak, system gamma, 75 percent HLG under the stated one-thousand-candelas-per-square-metre nominal-peak condition, and HLG-authored PLUGE. A warning says not to force one format while displaying another format’s pattern.
SDR, PQ, and HLG use different signal systems, reference relationships, PLUGE procedures, and measurement interpretations.

PQ HDR Reference White

Use a documented 203 cd/m² target patch under the declared workflow.

Report ITU-R BT.2408 identifies approximately 58 percent PQ for HDR Reference White. The display result should be measured.

Do not use this patch as peak white.

A conceptual PQ luminance path marks reference black, middle tones, HDR Reference White at 203 candelas per square metre and approximately 58 percent PQ, tone-mapping onset, display peak, and the PQ encoded endpoint at 10000 candelas per square metre. The diagram clearly states that Reference White is not peak white and that mapping onset and display peak are mode- and display-specific.
Report ITU-R BT.2408-9 retains 203 cd/m² at approximately 58% PQ for HDR Reference White, distinct from mode-specific mapping onset, display peak, and the PQ endpoint.

PQ EOTF windows

Use windows at several target luminance levels.

Record:

Tone-mapping patterns

Use step wedges, ramps, and real controlled clips.

Identify:

A smooth roll-off is not automatically correct.

Metadata test sets

For HDR10, vary:

For HDR10+, use a supported dynamic-metadata source.

Confirm that all intermediary devices pass the format.

Peak windows

Use several areas and durations.

Examples can include:

Do not compare results unless:

match.

Four HDR peak-window examples show 1 percent, 10 percent, 25 percent, and full-field areas. A time plot beneath them separates initial peak from stabilized and sustained output. Condition cards list window area, duration, color, picture mode, temperature, tone-mapping state, and pattern sequence. A warning says a peak number without these conditions is incomplete.
Peak luminance depends on screen area, duration, mode, temperature, color, tone mapping, and sequence, so an unlabeled high-level patch is insufficient.

HLG patterns

Use HLG-authored:

State:

Do not use PQ labels.

Gaming patterns

Console HDR screens

Use the console instructions after the television’s final Game Mode and mapping state are selected.

Use hard-clipping and graded-step patterns intended for the workflow.

Game-specific calibration

Some games:

Document the game.

Input lag

A static pattern cannot measure latency.

Use:

A five-level source hierarchy ranks formal standard implementations, documented discs or generators, validated downloadable files, path-specific streams, and unknown images or uploads. Each level states its use and limitation. The lowest level is marked not suitable for adjustment. A final checklist requires version, checksum, format description, playback instructions, expected result, and limitations for any hosted downloadable pattern package.
Formal implementations and documented pattern products provide stronger provenance than processed streams or unknown uploads, but every delivery path still requires validation.

Reference-oriented commercial suite

The current Spears & Munsil Ultra HD Benchmark is a three-disc UHD Blu-ray set with purpose-built SDR and HDR patterns and extensive documentation. [7][8]

It is a strong broad consumer source when the player path is configured correctly.

Formal standard pattern

Use standards such as:

through a generator or implementation whose values are documented.

A PDF image of the standard is not itself a playable reference signal.

Free SDR resource

AVS HD 709 remains a useful legacy BT.709 SDR set. [13]

Use an exact version and verify:

It is not a PQ or HLG source.

Browser motion tool

Use TestUFO for the browser and computer-display path. [15]

Do not generalize its result to every source.

Streaming test video

Use a documented streaming pattern when the purpose is to check that streaming path.

Treat it as path-specific because the platform processes the upload. [14]

Sources to use with caution

Unknown YouTube upload

Risks include:

Static web image

Risks include:

Demonstration disc

A demo sequence can reveal:

It is not a formal adjustment pattern unless the technical values are documented.

Old disc or file

A legacy SDR pattern can remain useful for the format it was authored for.

Do not use it as a current HDR source.

Hosting patterns on this site

Browser-hosted patterns should be labeled by purpose.

Safer browser-hosted material

High-risk browser-hosted material

Downloadable package requirements

Provide:

Quick test-pattern checklist

Before playback

Black

White

Grayscale

Color

Detail

Motion

HDR

What patterns can prove

A valid pattern can show that, for the tested path and state:

What patterns cannot prove

A pattern cannot by itself prove:

About this page

This page should be updated when:

The page should record:

Readers can report errors through the site’s published contact method.

The principle remains:

Trust the pattern only as far as its values, delivery path, and procedure are documented.

Sources and standards

ITU and SMPTE standards plus current Spears & Munsil, YouTube, TestUFO, and AVS HD 709 documentation used in this resource. Last verified August 6, 2026.

  1. International Telecommunication Union Radiocommunication Sector. Specifications of PLUGE Test Signals and Alignment Procedures for Setting of Brightness and Contrast of Displays. Recommendation ITU-R BT.814-4, July 2018, with editorial amendments in February 2020.
    https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.814-4-201807-I%21%21PDF-E.pdf

    ↩↩

  2. International Telecommunication Union Radiocommunication Sector. Image Parameter Values for High Dynamic Range Television for Use in Production and International Programme Exchange. Recommendation ITU-R BT.2100-3, February 2025.
    https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.2100-3-202502-I%21%21PDF-E.pdf

    ↩↩

  3. International Telecommunication Union Radiocommunication Sector. Specification of Colour Bar Test Pattern for High Dynamic Range Television Systems. Recommendation ITU-R BT.2111-3, May 2025.
    https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.2111-3-202505-I%21%21PDF-E.pdf

    ↩

  4. International Telecommunication Union Radiocommunication Sector. Parameter Values for the HDTV Standards for Production and International Programme Exchange. Recommendation ITU-R BT.709-6, June 2015.
    https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.709-6-201506-I%21%21PDF-E.pdf

    ↩

  5. International Telecommunication Union Radiocommunication Sector. Common 16:9 or 4:3 Aspect Ratio Digital Television Reference Test Pattern. Recommendation ITU-R BT.1729-0, April 2005.
    https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.1729-0-200504-I%21%21PDF-E.pdf

    ↩

  6. Society of Motion Picture and Television Engineers. RP 219-1, High-Definition, Standard-Definition Compatible Color Bar Signal and RP 219-2, Ultra High-Definition Compatible Color Bar Signal. Current recommended-practice index reviewed August 1, 2026.
    https://www.smpte.org/standards/document-index/rp

    ↩

  7. Spears & Munsil. Benchmark Discs and Ultra HD Benchmark 2023. Official product documentation reviewed August 1, 2026.
    https://spearsandmunsil.com/products/

    ↩

  8. Spears & Munsil. Getting Started with the Ultra HD Benchmark, 3rd Edition and Choosing a Color Space, Ultra HD Edition. Official documentation reviewed August 1, 2026.
    https://spearsandmunsil.com/portfolio-item/getting-started-with-the-ultrahd-benchmark-3rd-edition/

    ↩↩

  9. Spears & Munsil. Setting the Brightness Control, 2nd Edition. Official documentation reviewed August 1, 2026.
    https://spearsandmunsil.com/portfolio-item/setting-the-brightness-control-2/

    ↩

  10. Spears & Munsil. Setting the Contrast Control, 2nd Edition and Ultra HD edition. Official documentation reviewed August 1, 2026.
    https://spearsandmunsil.com/portfolio-item/setting-the-contrast-control-2/

    ↩

  11. Spears & Munsil. Setting Color and Tint and Using the Spears & Munsil Calibration Filter. Official documentation reviewed August 1, 2026.
    https://spearsandmunsil.com/portfolio-item/using-the-spears-munsil-calibration-filter/

    ↩

  12. Spears & Munsil. Pattern Help Text, 2nd Edition. Official documentation reviewed August 1, 2026.
    https://spearsandmunsil.com/portfolio-item/pattern-help-text/

    ↩

  13. AVS HD 709 Project. AVS HD 709 Blu-ray and MP4 Calibration. Legacy community SDR pattern set, archived copy reviewed August 1, 2026.
    https://archive.org/details/avs-hd-709-blu-ray-mp4-calibration

    ↩

  14. Google YouTube Help. YouTube Recommended Upload Encoding Settings and Upload High Dynamic Range Videos. Current platform documentation reviewed August 1, 2026.
    https://support.google.com/youtube/answer/7126552

    ↩↩

  15. Blur Busters. TestUFO. Current browser motion tests reviewed August 1, 2026.
    https://www.testufo.com/

    ↩↩

  16. International Telecommunication Union Radiocommunication Sector. A Reference Viewing Environment for Evaluation of HDTV Program Material or Completed Programmes. Recommendation ITU-R BT.2035-0, July 2013.
    https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.2035-0-201307-I%21%21PDF-E.pdf

    ↩

  17. Spears & Munsil. Technical Notes on the Patterns. Official documentation reviewed August 1, 2026.
    https://spearsandmunsil.com/portfolio-item/technical-notes-on-the-patterns/

    ↩

  18. International Telecommunication Union Radiocommunication Sector. Guidelines for operational practices in high dynamic range television production. Report ITU-R BT.2408-9, March 2026.
    https://www.itu.int/pub/R-REP-BT.2408-9-2026

Related reading: TV Calibration Verification: Confirm SDR, HDR, Inputs, and Apps See how controlled patterns fit into final SDR, HDR, input, and app verification. Back to Resources Return to the glossary, test patterns, equipment notes, legal information, and about page.