The SCTE has approved five standards, dealing with digital program insertion, encryption and other subjects.SCTE 35 2013a, "Digital Program Insertion Cueing Message for Cable," supports frame accurate signaling of events in MPEG-2 transport streams along with associated descriptive data, as well as splicing of MPEG-2 transport streams for digital program insertion, which includes ad insertion and insertion of other content types.SCTE 52 2013, "Data Encryption Standard - Cipher Block Chaining Packet Encryption Specification," defines a method for encrypting MPEG-2 transport stream packets using the Data Encryption Standard (DES) Cipher Block Chaining (CBC) encryption standard.SCTE 104 2013, "Automation System to Compression System Communications Applications Program Interface (API)," defines the communications API between an automation system and the associated compression system that will insert SCTE 35 private sections into an outgoing transport stream. The standard serves as a companion to both SCTE 35 and SCTE 30.SCTE 126 2013, "Test Method for Distortion of 2-way Amplifier Caused by Insufficient Isolation of Built in Diplex Filter," is intended to establish standard methodology to measure an amplifier's distortion caused by an upstream signal leaking through the diplex filter that is built inside of the amplifier of a cable system.SCTE 201 2013, "Open Media Security (OMS) Root Key Derivation Profiles and Test Vectors," defines a set of cryptographic key ladder profiles, additional requirements and test vectors for a key ladder implementation. It is an extension of the ETSI TS 103 162 [1] standard for a key ladder, by further defining certain aspects and providing test vectors to enable implementers to verify certain aspects of an implementation.All five standards are available at http://www.scte.org/standards/Standards_Available.aspx.
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