Barcode Technology - 4-State (PastBar) Barcode               Hide the description

PostBar, also known as CPC 4-State, is the black-ink barcode system used by Canada Post in its automated mail

sorting and delivery operations. It is similar to other 4 State barcode systems used by Australia Post and the United Kingdom's Royal Mail (from which it derives), but uses an obscured structure and encoding system unique to Canada Post. This particular bar code system is used on "flats" (which are larger-than-letter-size pieces of mail, such as magazines) and parcels.

Valid characters: 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ

Although all 4 State Bar Codes are based upon the same character set and all barcodes look very similar, there

are nevertheless strong distinctions, ensuring the uniqueness of the individual codes. For the main part, these distinctions lie in the algorithms for the check digit calculation, but also in the prefix and affix of the information characters. Furthermore, some of these codes only support figures, others however support also letters. Different compression procedures are also used for a compact display of the information characters. The user must in no way carry out any substitutions, as for example to print out the Canadian post barcode (Canadian Post Corporation) for mail to England (Royal Mail Customer Code).

This symbology, derived from the RM4SCC system used by the British Royal Mail, uses a series of bars, each of

which can individually have one of four possible states, to encode information used in automated sortation and delivery onto each piece of mail. Each bar can either be short and centred (known as a tracker), medium and elevated (an ascender), medium and lowered (a descender), or full height. This symbology also uses an element known as a Data Content Identifier (or DCI), which specifies what types of information are encoded into each barcode, such as postal codes, customer information, and exact delivery points. The information that goes into each barcode is obtained from the address printed on the front of the envelope it is ultimately printed on, as well as the physical dimensions of each piece of mail. This code also uses a Reed-Solomon error correction technique, so that in case a particular piece of mail is mishandled, the information encoded in the barcode can still be correctly decoded.

4-State is one of the many barcode formats currently in use.

A Barcode is a method of representing data in a visual, machine-readable form.

The barcode formats has two categories:

One-dimensional (1D) --- Barcodes represented data by varying the widths and spacings of parallel lines.

Two-dimensional (2D) --- Using rectangles, dots, hexagons and other geometric patterns to represented data.

Check digit:

Owing to the predefined setup of every single character, i.e. each consisting of two descenders and two ascenders, the necessary security is already given. Further, the code contains a check digit that is automatically generated by the ?Visual Bar Code Designer¡°. The check digit is calculated separately for the single postal administrations (e.g. Royal Mail, Australia Post, etc.) according to different specifications, so that no mix-up of the 4 State symbols can occur between the individual postal administrations..

Human Readable:

Most barcodes display their corresponding values below them, which makes it possible to human read and manually  enter the barcode values into the equivalent system when the barcode label is worn out and cannot be read by the barcode scanner.

The Advantages of using barcodes:

If you want to reduce costs and save time, using barcodes is a good choice. Whether you are a company or a non-commercial organization, to improve efficiency and reduce overhead, barcodes are a valuable and viable option, which is economical and reliable.

Using a barcode system can make the working process simple and easy, so it can reduces the employee training time. It only takes a few minutes to master the barcode scanner to collecting data, employees no need to familiar with the entire inventory or pricing process. This also reduces the cost of employee training.

The bar code design and printing cost are low. Generally speaking, no matter how they are used or where they are posted, the cost is not high. They can be customized economically, in a variety of finishes and materials.

Barcodes are cheap and user-friendly, providing an indispensable tool for tracking data from pricing to inventory. The end result of a comprehensive bar code system is reduced overhead.

 http://barcode.design/ - For Online

 http://Free-Barcode.com/ - For PC

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