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BD-J Object

A BD-J Object, unlike an Movie Object, is not an object file, but a table of Java applications or command programs (Xlets), that trigger Playlist playback, other Movie/BD-J Objects, and Java programs.

on Thursday, February 19, 2026 | Code, files, Objects, Software | A comment?

Movie Object

A Movie Object is an executable object file with a set of navigation commands that start playlist playback upon user instruction or execute another Movie Object.

| Code, files, Objects, Software | A comment?

Browsable Slideshow

A Browsable Slideshow is in an interactive framework for the user to navigate still images of galleries or text information. Still images may be presented and changed without interruption to audio playback.

on Saturday, August 9, 2025 | Graphics, Misc., Software, Video | A comment?

Java Virtual Machine

A Java virtual machine (JVM) is a virtual machine that enables a computer to run Java programs.

on Thursday, May 22, 2025 | BD-J, Java, Software | A comment?

Linux

Linux is an open-source operating system created by Linus Torvald.

on Tuesday, December 17, 2024 | Misc., Software | A comment?

Basic Menu Design for Movies

When creating a BD movie, most of them come with a menu for playing the main feature and navigating scenes, settings, or extras. BD menus are more advanced than DVDs.

on Saturday, December 7, 2024 | Menus, Software | A comment?

HDMV Navigation Command Language

HDMV mode uses the HDMV Navigation Command Language (or Navi Commands) for it's HDMV interactive applications. It is used primarily for scripting menu navigation and button actions, its typing discipline is relatively straightforward. It is also used to program the menu's interactive graphics and animations.

on Saturday, August 24, 2024 | Code, Software | A comment?

Networking

Unlike HDMV, BD-J can access a local or online network connection using secure HTTPS and TCP/IP protocols when connecting to servers and URLs.

on Sunday, June 16, 2024 | Apps, Software | A comment?

Local Storage

BD-J includes support for Local Storage. Two types of Local Storage are used – mandatory Application Data Area and optional Binding Unit Data Area. All Local Storage is accessed using methods from the Java IO package.

| Hardware, Software | A comment?

Multi-Angel Viewing

Like DVD, Blu-ray allows multi-angle viewing, giving viewers the ability to observe different perspectives of the same scene using the Angle button on the remote.

| Misc., Software, Video | A comment?

Memory & Limitations

In a BDMV application, memory is divided into three buffers: a Primary, Secondary, and Preloading

on Monday, May 6, 2024 | Hardware, Software | A comment?

Profiles

The defined BD-ROM specifications are called "profiles." These are a set of standards that players must meet to ensure full capability and functionality. These different profiles are implemented on the players that exist in the market.

| Hardware, Software | A comment?

Metadata

Blu-ray provides standardized metadata for disc applications, helping users identify BD applications in the Blu-ray player's menu.

on Saturday, May 4, 2024 | Apps, Code, Software | A comment?

BD-J

BD-J is an interactive mode intended for advanced interactivity, such as fancy menus and video games. It is more advanced than HDMV mode as it supports object-oriented programming, complex animations, true-color graphics, more memory, and networking capabilities. Major and mini-major studios often use BD-J for their custom programming framework that suits their needs without the restrictions of HDMV.

on Friday, April 19, 2024 | Java, Software | A comment?

List of AACS and Certificate files

on Wednesday, April 10, 2024 | DRM, Software | A comment?

OpenType

**OpenType**

Type of format	Font file
First released	1997
Developer	Microsoft, Adobe
Filename extension	`.ott`, `.ttf`
Limits	Unlimited number of files
Open Format?	Yes
Free Format?	Yes
Magic Number	N/A

OpenType is an victor-based font format developed by Microsoft and Adobe.

on Tuesday, April 9, 2024 | files, Java files, Software | A comment?

D-BOX

**D-BOX Motion Code**

Type of format	Haptic Data
First released	2001?
Developer	D-BOX Technologies Inc.
Filename extensions	`.klk`, `.iid`, `.syn`
Open Format?	No
Free Format?	No
Magic Number	None

D-BOX is a haptic motion technology format from D-BOX Technologies Inc. It's not part of the Blu-ray specifications but it's an optional peripheral feature.

| Hardware, Misc., Software | A comment?

INI file

**INI**

Type of format	Configuration file
First released	1985?
Developer	Microsoft?
Filename extension	`.ini`
Open Format?	Yes
Free Format?	Yes
Magic Number	None

An INI is a text-based configuration file for computer software that consists of a text-based content with a structure and syntax comprising key–value pairs for properties, and sections that organize the properties. In context of BD-J, INI files are optionally used as configuration files for BD-J programs.

| Software | A comment?

.properties

**.properties**

Type of format	Configuration Data file
First released	1993?
Developer	Sun Microsystems?
Filename extension	`.properties`
Open Format?	Yes
Free Format?	Yes
Magic Number	None

.properties is a text-based file extension for files mainly used in Java-related technologies to store the configurable parameters of an Java application.

on Monday, April 8, 2024 | Java, Java files, Software | A comment?

Text file

**Plain Text file**

Type of format	Data file, Document file format, Generic container format
First released	Before 1989
Developer	Unknown
Filename extension	`.txt`
Open Format?	Yes
Free Format?	Yes
Magic Number	None

Text files (also known as Plain text) consist of characters encoded sequentially in a particular character encoding (commonly Unicode-8 and ASCII). Plain text files contain no formatting information other than white space characters.