{"id":10233,"date":"2022-06-21T09:11:39","date_gmt":"2022-06-21T09:11:39","guid":{"rendered":"https:\/\/developer.rdkcentral.com\/documentation\/documentation\/documentation\/rdk_video_documentation\/sub-systems\/voice\/"},"modified":"2024-12-04T14:10:50","modified_gmt":"2024-12-04T14:10:50","slug":"voice","status":"publish","type":"page","link":"https:\/\/developer.rdkcentral.com\/documentation\/documentation\/rdk_video_documentation\/sub-systems\/voice\/","title":{"rendered":"Voice"},"content":{"rendered":"


\n <\/p>\n

The RDK Voice Service is a service for transmitting voice data over BLE in the RDK ecosystem. The RDK Voice Service is specifically designed to enable voice control of a BLE voice client. <\/span>This document defines detailed requirements for the RDK Voice Service. It is intended to specify transmission of voice data from an RVS server to an RVS client.<\/span><\/p>\n

References<\/strong><\/h3>\n

Reasonable effort is made to keep references up to date with respect to versions and release dates, however manufacturers are responsible for ensuring they have the most recent version of a reference specification (unless otherwise noted). <\/span>Where conflicts exist between requirements contained in this specification and normative references, the specification requirements govern.<\/span><\/p>\n

Normative References<\/span><\/h3>\n

[ADPCM]                            Recommended Practices for Enhancing Digital Audio Compatibility in Multimedia Systems, IMA Digital Audio Focus and Technical Working Groups; DATWG Recommendation, October 21, 1992.<\/p>\n

[BLUETOOTH]<\/span>                     Bluetooth Core Specification version 4.0 or later <\/span><\/span><\/p>\n

Terms and Definitions<\/span><\/h3>\n
\n\n\n<\/colgroup>\n\n\n\n\n\n
\n

Term<\/strong><\/p>\n<\/th>\n

\n

Definition<\/strong><\/p>\n<\/th>\n<\/tr>\n<\/thead>\n

\n

Adaptive Differential Pulse-Code Modulation<\/strong><\/p>\n<\/td>\n

\n

A compression algorithm that varies the size of the quantization step, allowing further reduction of the required bandwidth for a given signal-to-noise ratio.<\/p>\n<\/td>\n<\/tr>\n

\n

Opus<\/strong><\/p>\n<\/td>\n

\n

\u00a0<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n<\/div>\n

Abbreviations and Acronyms<\/strong><\/h3>\n
\n\n\n<\/colgroup>\n\n\n\n\n\n
\n

Abbrv<\/strong><\/p>\n<\/th>\n

\n

Acronym<\/strong><\/p>\n<\/th>\n<\/tr>\n<\/thead>\n

\n

ADPCM<\/strong><\/p>\n<\/td>\n

\n

Adaptive Differential Pulse-Code Modulation<\/p>\n<\/td>\n<\/tr>\n

\n

RVS<\/strong><\/p>\n<\/td>\n

\n

RDK Voice Service<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n<\/div>\n

BLE Voice Overview<\/strong><\/h3>\n

The RDK Voice Service exposes data and associated formatting for streaming voice audio from an RDK Remote Control Device to an RDK based STB.<\/p>\n

Conformance<\/strong><\/h3>\n

All capabilities indicated as mandatory for this Service shall be supported in the specified manner (process-mandatory). This also applies for all optional and conditional capabilities for which support is indicated.<\/span><\/p>\n

Service Dependency<\/strong><\/h3>\n

This service is not dependent upon any other services.<\/span><\/p>\n

Bluetooth Specification Release Compatibility<\/strong><\/h3>\n

This specification is compatible with any Bluetooth core specification as defined in [BLUETOOTH] that includes the Generic Attribute Profile (GATT) specification and the Bluetooth Low Energy Controller specification.<\/span><\/p>\n

GATT Sub-Procedure Requirements<\/strong><\/h3>\n

Requirements in this section represent a minimum set of requirements for an RDK Remote Control Device (GATT Server). Other GATT sub-procedures may be used if supported by both Client and Server.<\/span><\/p>\n

Table<\/span> below summarises additional GATT sub-procedure requirements beyond those required by all GATT Servers.<\/span><\/p>\n

\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n
\n

GATT Sub-Procedure<\/p>\n<\/th>\n

\n

Requirement<\/p>\n<\/th>\n<\/tr>\n<\/thead>\n

\n

Read Characteristic Value<\/p>\n<\/td>\n

\n

M<\/p>\n<\/td>\n<\/tr>\n

\n

Write Characteristic Value<\/p>\n<\/td>\n

\n

M<\/p>\n<\/td>\n<\/tr>\n

\n

Write Without Response<\/p>\n<\/td>\n

\n

O<\/p>\n<\/td>\n<\/tr>\n

\n

Notification<\/p>\n<\/td>\n

\n

M<\/p>\n<\/td>\n<\/tr>\n

\n

Read Characteristic Descriptors<\/p>\n<\/td>\n

\n

M<\/p>\n<\/td>\n<\/tr>\n

\n

Write Characteristic Descriptors<\/p>\n<\/td>\n

\n

M<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n

Transport Dependencies<\/strong><\/h3>\n

The service shall only operate over an LE transport.<\/p>\n

Error Codes<\/strong><\/h3>\n

This service does not define any application error codes that are used in Attribute Protocol.<\/p>\n

Byte Transmission Order<\/strong><\/h3>\n

All characteristics used with this service shall be transmitted with the least significant octet first (i.e., little endian).<\/p>\n

Service Requirements<\/strong><\/h3>\n

Service Declaration<\/strong><\/h3>\n

The service UUID shall be set to:\u00a0TBD<\/p>\n

Service Roles<\/strong><\/h3>\n

A remote control or similar low power device enabled with one or multiple microphones should function as an RVS Server.\u00a0<\/p>\n

A settop box or other host capable of processing transmitted voice data should function as an RVS Client<\/p>\n

Service Sequence Examples<\/strong><\/h3>\n

Push-to-talk Voice Session Sequence<\/a><\/strong><\/p>\n

Explicitly Rejected Push-to-talk Voice Session Sequence<\/a><\/strong><\/p>\n

Far-Field Voice Session Sequence<\/a><\/strong><\/p>\n

Characteristic Overview<\/a><\/strong><\/h3>\n

\u00a0<\/p>\n

\u00a0<\/p>\n

\u00a0<\/p>","protected":false},"excerpt":{"rendered":"

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