{"id":690362,"date":"2024-11-06T05:21:52","date_gmt":"2024-11-06T05:21:52","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/tia-102-babb1999-r2013\/"},"modified":"2024-11-06T05:21:52","modified_gmt":"2024-11-06T05:21:52","slug":"tia-102-babb1999-r2013","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/tia\/tia-102-babb1999-r2013\/","title":{"rendered":"TIA-102.BABB:1999 (R2013)"},"content":{"rendered":"

This document specifies the procedures to be employed to test
\nthat implementations of TIA-102.BABA compatible speech codecs
\ncomply with the standard. This speech codec is the Improved
\nMulti-Band Excitation (IMBETM<\/sup>, a trademark of Digital
\nVoice Systems Inc.) system described in TLA-102.BABA, Project
\n25 Vocoder Description<\/i>. The IMBE speech codec is used to
\ndigitally encode the speech signal and provide forward error
\ncontrol for transmission at a data rate of 7200 b\/s.<\/p>\n

The need for this standard arises from the fact that
\nimplementations of speech coders do not need to have identical
\nnumerical precision in the internal arithmetic operations to be
\ncompatible. Since individual designers implement algorithms in
\ndifferent manners, it is not possible to create a standard set of
\ntest vectors to assess conformance to a standard. This document
\ndescribes a series of tests that are used to test conformance to
\nthe specification. These tests do not necessarily ensure that the
\nspeech codecs operate satisfactorily under all possible input
\nsignals and it is still a requirement of the manufacturer to ensure
\nthat his implementation operates in a consistent manner. The
\npurpose of these tests is to test for standard compliance. The
\nmanufacturer is encouraged to provide the highest possible
\nperformance but it is not the purpose of these tests to determine
\nthat performance.<\/p>\n

The testing of the codecs is based upon subjective tests which
\nemploy listening tests to judge overall speech quality.<\/p>\n

This standard takes the approach of def\u00edning a reference speech
\ncodec and then each manufacturer tests his implementation relative
\nto the reference. All possible combinations of test codec to
\nreference codec are evaluated. The reference speech codec is based
\nupon the Digital Voice Systems Incorporated implementation of the
\nIMBE algorithm on the VC-20 Project 25 hardware card.<\/p>\n","protected":false},"excerpt":{"rendered":"

Project 25 – Vocoder Mean Opinion Score Conformance Test<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
TIA<\/b><\/a><\/td>\n1999<\/td>\nNA<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":0,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2646],"product_tag":[],"class_list":{"0":"post-690362","1":"product","2":"type-product","3":"status-publish","5":"product_cat-tia","7":"first","8":"instock","9":"sold-individually","10":"shipping-taxable","11":"purchasable","12":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/690362","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=690362"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=690362"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=690362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}