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7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 3.3 Abbreviations | For the purposes of the present document, the following abbreviations apply: ACK Acknowledgement message DL DownLoad DNS Domain Name System E2E End-to-End FFS For Further Study FIN FIN message FTP File Transfer Protocol GET HTTP method GET HTTP Hypertext Transfer Protocol IAD Integrated Access Device ICMP Internet Cont... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.0 KPIs overview | To determine the quality of high-speed internet connections, the following measurement and KPI values are determined. Table 4.0-1: Overview of quality benchmarks for DNS 1. DNS Lookup Time [ms]; see clause 5.1 2. DNS Lookup Failure Ratio [%]; see clause 5.10 of [2] 3. DNS Host Name Resolution Time; see clause 5.11 of [... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.1 PING | |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.1.1 PING Packets Missing [%] | The parameter value "PING Packets Missing" indicates the ratio in percentage of ICMP echo replies not received to the total number of initiated ICMP echo requests. An ICMP echo reply is deemed not received if it does not arrive within the timeout of 10 seconds from an ICMP echo request. PING Packets misssing % = number... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.1.2 PING Packet Errors [%] | The parameter value PING Packet Errors indicates the percentage ratio of ICMP echo replies with errors to the total number of ICMP echo replies received. PING Packets Errors % = number of ICMP echo errors received total number of ICMP echo replies received × 100 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.1.3 PING Failure Ratio [%] | The parameter value PING Failure Ration represents the PING Failure Ratio as a percentage. A PING measurement is considered unsuccessful if ICMP echo replies are missing, have errors (e.g. the target does not respond with the same value in the "Sequence Number"), or the mean response time (PING Average Time) exceeds 1 ... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.2 HTTP | |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.2.1 HTTP Response Time | The HTTP Response Time is defined as the time elapsed between the sending of the initial Sending of First TCP SYN and the receipt of the first HTTP GET command. To determine the various HTTP download parameters of the products, a standardized HTTP download to data reference systems is performed. In addition, four HTTP ... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.2.2 HTTP Download Throughput | NOTE: Following the testing specified and results presented in Recommendation ITU-T Y.1540 [3], this metric should not be used to measure access performance (using TCP transport). TCP throughput measurements tend to under-estimate the network operator's access performance. A standardized HTTP download is conducted to d... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.2.3 HTTP Download Throughput [%] of Bandwidth | The value HTTP Download Throughput [%] of Bandwidth is the percentage ratio of the reduced HTTP downloads to the HTTP downloads undertaken in total. HTTP Download Throughput % = ratio of the reduced HTTP downloads HTTP downloads undertaken in total × 100 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.2.4 HTTP Percentage of invoiced Bandwidth [%] | The HTTP Percentage of invoiced Bandwidth indicates the ratio in percent of the actual measured HTTP download throughput against the nominally invoiced bandwidth. HTTP invoiced bandwith % = actual measured HTTP download nominal invoiced bandwith × 100 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.2.5 HTTP Upload Response Time | The HTTP Upload Response Time is defined as the time elapsed between the sending of an initial HTTP request (GET HTTP) to the receipt of the first HTTP Response Packet (TCP Packet). |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.2.6 HTTP Upload Throughput | The HTTP upload throughput is defined as the available upstream bandwidth in kbit/s. NOTE: Following the testing specified and results presented in Recommendation ITU-T Y.1540 [3], this metric should not be used to measure access performance (using TCP transport). TCP throughput measurements tend to under-estimate the ... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.2.7 HTTP Upload Throughput [%] of Bandwidth | The value HTTP Upload Throughput [%] of Bandwidth is the percentage ratio of the reduced HTTP uploads to the Nominal invoiced bandwidth. HTTP Upload Throughput % = reduced HTTP upload HTTP nominal invoiced bandwith × 100 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.2.8 Number of HTTP Sessions | Number HTTP Sessions is defined as a number of HTTP flows grouped together as per the heuristics below in order to comprise the view of a unique web page. ETSI ETSI TS 103 222-2 V1.3.1 (2025-02) 15 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.2.9 HTTP Dropped Sessions [%] | The number percentage of HTTP Dropped Sessions indicates the ratio between the dropped file DL/UL connections and the total file DL/UL Sessions. HTTP dropped sessions Upload Throughput % = HTTP dropped sessions total HTTP number of sessions × 100 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.2.10 HTTP Download Failure Ratio [%] | The HTTP Download Failure Ratio is defined as the ratio of failed HTTP downloads to the total number of initiated HTTP downloads as a percentage. HTTP download Failure Ratio = failed HTTP downloads total number of initiated HTTP downloads × 100 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.2.11 HTTP peak download throughput | The definition of HTTP peak download throughput is for FFS. |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.3 FTP | |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.3.1 FTP Upload/Download Throughput | The FTP Upload/Download Throughput determines the available upstream/downstream bandwidth. NOTE: Following the testing specified and results presented in Recommendation ITU-T Y.1540 [3], this metric should not be used to measure access performance (using TCP transport). TCP throughput measurements tend to under-estimat... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.3.2 FTP Upload/Download Throughput [%] of Bandwidth | The value FTP Upload Throughput [%] of Bandwidth is the percentage ratio of the reduced FTP Uploads/Download to the FTP Uploads undertaken in total. FTP throughput % = reduced UL/DL FTP throughput FTP UL/DL taken in total × 100 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.3.3 FTP Percentage of invoiced Bandwidth [%] | The FTP Percentage of invoiced Bandwidth indicates the ratio in percent of the FTP Upload/Download Throughput measured as against the bandwidth invoiced. FTP percentage of invoiced bandwidth % = reduced UL/DL FTP throughput nominal invoiced bandwidth × 100 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.3.4 FTP Download Throughput [%] of Bandwidth | The value FTP Upload Throughput [%] of Bandwidth is the percentage ratio of the reduced FTP Download to the FTP Download undertaken in total. |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.3.5 File Download/Upload Data Transfer Cut-off [%] | The parameter "File Download/Upload Data Transfer Cut-off" describes the probability that a successfully started FTP stream reproduction is ended by a cause other than the intentional termination by the user. Data Cut −off Ratio [%] = × 100 ETSI ETSI ... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.3.6 FTP {Download|Upload} Service non-accessibility [%] | In networks where dedicated bearers are mandatory for access to a special service, an activation FTP failure results in service non accessibility for the user of the IP network requesting the service. The dedicated FTP activation failure ratio measures the probability that a dedicated FTP transfer cannot be activated. ... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.3.7 FTP {Download|Upload} Retransmission Ratio | FTP Retransmission Ratio defines the number of counted retransmitted FTP/TCP packets divided by total number of counted packets within a certain direction (uplink/downlink) per user. The formula used to compute this indicator is: TCP Retransmission Ratio = 100 ∑ Number of Resend Packets + Number of Wrong resent Packet... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.3.8 FTP {Download|Upload} packet loss rate [%] | The FTP {Download|Upload} packet loss rate [%] indicates the percentage ratio of lost FTP packets replies with the total number of FTP Packets received. FTP Packet lost rate % = number of loss FTP total number of FTP packets received × 100 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.3.9 FTP Retransmission Ratio [%] | The FTP Retransmission Ratio [%] indicates the ratio of retransmitted FTP packets replied with the total number of FTP Packets received. FTP retransmission ratio % = number of retransmitted FTP received total number of FTP packets received × 100 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.4 TCP | |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.4.1 TCP Round Trip Time (Server side) | Time from the SYN to the SYN/ACK packet in the TCP handshake (SYN - SYN/ACK - ACK) (see figure 4.4.2-1). |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.4.2 TCP Round Trip Time (Client side) | Time from the SYN/ACK to the ACK packet in the TCP handshake (SYN - SYN/ACK - ACK) (see figure 4.4.2-1). ETSI ETSI TS 103 222-2 V1.3.1 (2025-02) 17 Figure 4.4.2-1: TCP RTT (Round-Trip Time): Client & Server Side |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.4.3 TCP Retransmission Ratio | TCP Retransmission Ratio defines the number of counted retransmitted TCP packets divided by total number of counted packets within a certain direction (uplink/downlink) per user. The formula used to compute this indicator is: TCP Retransmission Ratio 100 ∑ Resend Packets Wrong resent Packets ∑ total number o... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.4.4 TCP Data Call Access Failure Ratio | The Data Call Access Failure Ratio defines the failure ratio in the period from initiating the data call to alerting or to the busy signal. The formula used to compute this indicator is: Data Call Failure Ratio !%# 100 ∑ , , , ∑ ... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.4.5 TCP Data Call Access Time | Time from the TCP connection creation request (SYN) to the first packet of response (e.g. HTTP GET response) (Equivalent to the "IP Service Setup Time" for the services above: browsing). |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.4.6 TCP Server Response Time | The TCP Server Response Time is defined as the time from the first request packet (e.g. HTTP GET request) to the first received packet (e.g. first packet of HTTP GET response). ETSI ETSI TS 103 222-2 V1.3.1 (2025-02) 18 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.5 IP/UDP Capacity | |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.5.1 Conventions and Definitions for IP/UDP Metrics | Recommendation ITU-T Y.1540 [3] defines a set of conventions for IP-layer metrics, which are re-used here. A key definition composed using these conventions determines when a packet has been successfully transferred between a Source host and Destination host (the two ends in end-to-end case referred to below). A transm... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.5.2 IP packet sending bit rate | For a given population of interest, the IP Packet Sending Bit Rate (IPSBR) generated by the Source host is the number of bits in the IP packet headers and payloads resulting in IP packet reference events divided by the time interval duration. NOTE: This definition is consistent with Recommendation ITU-T Y.1540 [3]. |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.5.3 Maximum IP-layer Capacity | For a given population of interest, the maximum IP-layer capacity during time interval [t, t + Δt] is: Maximum_C(t, Δt) = [ ,∆ ], where: time interval [t, t + Δt] is composed of x equal sub-intervals, dt in length; n0 is the total number of IP-layer header and payload bits that can be transferred ove... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 4.5.4 Method of Measurement for Maximum IP-layer Capacity | The method(s) of measurement for the maximum IP-layer capacity shall meet the requirements in annex A of Recommendation ITU-T Y.1540 [3]. NOTE: The method(s) of measurement in Recommendation ITU-T Y.1540 [3] may be refined over time, resulting in new annexes. ETSI ETSI TS 103 222-2 V1.3.1 (2025-02) 19 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 5 Cloud Services | |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 5.0 Introduction | With the cloud service tests the response time measurements are performed accessing favourite websites. |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 5.1 DNS Lookup Time | The DNS Lookup Time is defined as the time that elapses from the sending of a DNS request (DNS query) to the IAD until receipt of the resolved IP address (DNS query response). Network DNS Query DNS query response MU VoIP (IAD) „A“ side Data Reference System „B“ side Figure 5.1-1: DNS Lookup Time |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 5.2 Web browsing indicators | |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 5.2.1 Introduction | Web browsing indicators are some of the most important ones in order to measure the QoE on a per-subscriber basis. Figure 5.2.1-1 shows a sequence diagram with the measurements of the different indicators. Figure 5.2.1-1: Web browsing ETSI ETSI TS 103 222-2 V1.3.1 (2025-02) 20 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 5.2.2 HTTP Concepts | The following terms are used to define the HTTP KPIs formulae: • HTTP Flow: An HTTP flow is any TCP connection established between a Source IP Address with the Source IP Port to a Destination IP Address with a Destination IP Port where the destination IP port is :80 o :8080. In the scope of this clause, Web Browsing in... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 5.2.3 Website Response Time | The Website Response Time is defined as the time that elapses between the sending of the initial HTTP request (GET HTTP) and the arrival of the complete HTTP response (see green arrow in figure 5.2.3-1). Figure 5.2.3-1: Website Response Time ETSI ETSI TS 103 222-2 V1.3.1 (2025-02) 22 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 5.2.4 Website Load Duration Time | The Website Load Duration Time (see figure 5.2.4-1) is defined as the time that elapses between the sending of the website request in the browser to the receipt and processing of all elements. Network MU VoIP (IAD) „A“ side Web Server DNS query DNS Responce TCP established GET HTTP HTTP 200 OK Browser Website request D... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 5.2.5 Website Session Duration Time | The Website Session Duration Time (see figure 5.2.5-1) is defined as the time that elapses between the sending of the website request in the browser to the receipt of all HTTP responses. ETSI ETSI TS 103 222-2 V1.3.1 (2025-02) 23 Network VoIP (IAD) „A“ side Web Server DNS query DNS Responce TCP established GET HTTP HTT... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 5.2.6 Website Download Failure Ratio | The HTTP Download Failure Ratio is the ratio of failed HTTP downloads to the total initiated HTTP downloads as a percentage. If the HTTP download of a website is incorrect or exceeds the Website Response Time of 1 second, the HTTP download is rated as failed. ETSI ETSI TS 103 222-2 V1.3.1 (2025-02) 24 |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6 Streaming | |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.0 QoE Streaming Indicators | Figure 6.0-1 shows what is measured by each of the key QoE indicators for the streaming service. Figure 6.0-1: Streaming QoE indicators |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.1 Streaming indicators | This clause provides a thorough description of the QoE indicators related to the streaming category. Figure 6.1-1 displays a summary of the different indicators in a sequence diagram. Client OS Server OS AppLevel Probe SYN SYN SYN/ACK SYN/ACK GET / GET / 200 OK 200 OK GET video.flv, content-type=video/flv 200 OK (metad... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.2 Streaming Reproduction Cut-Off Ratio | Streaming Reproduction Cut-Off Ratio is described in clause 6.5.6 of [2]. |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.3 Time to Stream Start | The Time to Stream Start is defined as the time between the User request for the Stream until the Stream starts playing. Streaming Service Access Time + Streaming Reproduction Start Delay. This indicator is computed as: Stream Start ∑ Streaming Service Access Time Streaming Reproduction Start Delay #Re... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.4 Streaming Reproduction Start Failure Ratio [%] | Streaming Reproduction Start Failure Ratio describes the probability of unsuccessful stream reproduction. This includes streaming access failure before the service has been accessed. This indicator is computed in the following way: Streaming Reproduction Start Failure Ratio = 100 Number of Streaming Error Flows Number ... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.5 Total Number of Videos | The "Total Number of Videos" is the total number of videos that started reproduction on the user equipment and have finished during the aggregation period. |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.6 Total Reproduction Time | Total Reproduction Time is the total duration of the video stream which has been downloaded. Note it is not the total duration of the video as stored on the server. |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.7 Effective Reproduction Time | Effective Reproduction Time is the average duration of the video stream which has been downloaded. This indicator is computed in the following way: Effective Reproduction Time = ∑Reproduction Time Number of Reproduction Started Videos Where: • Reproduction Time is the total duration the video stream has been downloaded... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.8 Rebuffering Time Percentage | Rebuffering Time Percentage is the percentage of the Streaming Rebuffering Time over Total Streaming Reproduction Time. This indicator is computed as follows: Rebuffering Time Percentage = 100 ∑ TimeRebuffering ∑ Streaming Effective Reproduction Time ETSI ETSI TS 103 222-2 V1.3.1 (2025-02) 27 W... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.9 Streaming Mean Data Rate | The Streaming Mean Data Rate is defined as Streaming Session Average Throughput on streaming traffic. |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.10 Streaming Peak Data Rate | Streaming Peak Data Rate is defined as the Streaming Session Peak Throughput. |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.11 Effective Reproduction Time | The Effective Reproduction Time is defined as the time that the video has been actually played (not the nominal duration from metadata). |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 6.12 Number Streaming Sessions | Number Streaming Sessions is defined as the number of connections established against streaming services. |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 7 Gaming | |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 7.0 Introduction | To determine the quality of high-speed internet gaming connections, the following measurement and KPI values are determined. Table 7.0-1: Overview of quality benchmarks for gaming Gaming 1. Number of Gaming Sessions 2. Gaming Sessions Average Duration 3. Gaming Sessions Average Duration [min] 4. Gaming Average Throughp... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 7.1 Number of Gaming Sessions | Number of Gaming Sessions is the number of flows identified as gaming sessions. This metric is computed by summing up all the flows identified as gaming in the given time interval: #Gaming Flows = ∑_Gamingflows |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 7.2 Gaming Session Duration | The Gaming Session Duration is the average duration of gaming session flows. This metric is computed by dividing the total duration of all gaming flows by the number of all flows in a given time interval: Avg Gaming Session Duration = ∑ Duration Number of Gaming Flows |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 7.3 Gaming Average Throughput Uplink | Gaming Average Throughput Uplink is considered to be the average gaming throughput, so it is measured in the following way: Gaming Average Throughput Uplink = ∑ Session Volume Uplink ∑ Effective Session Time Uplink Where: • is the total effective volume in the aggregation period. • ... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 7.4 Gaming Average Throughput Downlink | The Gaming Average Throughput Downlink is considered to be the average gaming throughput, so it is measured in the following way: Gaming Average Throughput Downlink = ∑ Session Volume Downlink ∑ Effective Session Time Downlink Where: • is the total effective volume in the aggregation per... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 7.5 Gaming Packet Loss Ratio (Uplink/Downlink) | Gaming Packet Loss Ratio (Uplink/Downlink) is the Number of counted loss TCP packets divided by total number of counted packets within a certain direction (uplink/downlink) per user. The formula used to compute this indicator is: TCP Loss Packets Ratio = 100 ∑ Number of Loss Packets ∑ Total number of flow ... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 7.6 Gaming TCP Retransmission Ratio (Uplink/Downlink) | Gaming TCP Retransmission Ratio (Uplink/Downlink) is the Number of counted retransmitted TCP packets divided by total number of counted packets within a certain direction (uplink/downlink) per user. The formula used to compute this indicator is: TCP Retr Ratio = 100 ∑ Number of Resend Packets + Number of Wrong resent ... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 7.7 Gaming End-to-end Latency | Gaming End-to-end Latency is the measured round-trip time covering the complete end to end perspective (both within Operator network (only Operator network segment) and including external network elements (for example end to end latency for accessing public Internet servers). The formula used to compute this indicator ... |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 7.8 Gaming Traffic Volume (Uplink/Downlink) | Gaming Traffic Volume is the total number of bytes corresponding to gaming flows. This metric is computed by adding up all the volume corresponding to flows identified as gaming in the given time interval: #Gaming Flows Volume |
7d72f0431baea8a0831c08648909ba20 | 103 222-2 | 7.9 Daily Number of Unique Users | Daily Number of Unique Users is the daily number of unique users making use of gaming flows. Time to Stream Start ∑ Streaming Service Access Time Streaming Reproduction Start Delay #Reproduction Started Streaming Flows Where: • The "Streaming Service Access Time" is the duration of a service access from ... |
2bd4d4c8f857c74c107a3adf45a19c28 | 103 191-1 | 1 Scope | The present document provides the Protocol Implementation Conformance Statement (PICS) pro forma for Conformance test specification for MAPEM-SPATEM, IVIM and SREM-SSEM as defined in SAE J2735 [i.3] and ETSI TS 103 301 [1] in compliance with the relevant requirements and in accordance with the relevant guidance given i... |
2bd4d4c8f857c74c107a3adf45a19c28 | 103 191-1 | 2 References | |
2bd4d4c8f857c74c107a3adf45a19c28 | 103 191-1 | 2.1 Normative references | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced documents which a... |
2bd4d4c8f857c74c107a3adf45a19c28 | 103 191-1 | 2.2 Informative references | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. NOTE: While any hyperlinks i... |
2bd4d4c8f857c74c107a3adf45a19c28 | 103 191-1 | 3 Definition of terms, symbols and abbreviations | |
2bd4d4c8f857c74c107a3adf45a19c28 | 103 191-1 | 3.1 Terms | For the purposes of the present document, the terms given in ETSI TS 103 301 [1], ISO/IEC 9646-1 [i.1] and ISO/IEC 9646-7 [i.2] apply. |
2bd4d4c8f857c74c107a3adf45a19c28 | 103 191-1 | 3.2 Symbols | Void. |
2bd4d4c8f857c74c107a3adf45a19c28 | 103 191-1 | 3.3 Abbreviations | For the purposes of the present document, the following abbreviations apply: ATS Abstract Test Suite ISO International Organization for Standardization ITS Intelligent Transport Systems ITS-S Intelligent Transport Systems-Station IUT Implementation Under Test IVI Infrastructure to Vehicle Information IVIM IVI-message M... |
2bd4d4c8f857c74c107a3adf45a19c28 | 103 191-1 | 4 Conformance requirement concerning PICS | The PICS pro forma to be filled in by a supplier shall be as shown in annex A. ETSI ETSI TS 103 191-1 V1.3.1 (2021-11) 7 Annex A (normative): MAPEM-SPATEM, IVIM SREM-SSEM and RTCMEM PICS pro forma A.1 Partial cancellation of copyright Notwithstanding the provisions of the copyright clause related to the text of the pre... |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 1 Scope | The present document specifies a coded representation (a bitstream) of audio information, and specifies the decoding process. The coded representation specified herein is suitable for use in digital audio transmission and storage applications. Building on the technology specified in [1], the present document specifies ... |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 2 References | |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 2.1 Normative references | References are either specific (identified by date of publication and/or edition number or version number) or nonspecific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are... |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 2.2 Informative references | References are either specific (identified by date of publication and/or edition number or version number) or nonspecific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. NOTE: While any hyperlinks inc... |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 3 Definitions, symbols, abbreviations and conventions | |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 3.1 Definitions | For the purposes of the present document, the following terms and definitions apply: (audio) channel: data representing an audio signal designated to a dedicated speaker position A-JOC substream: object audio substream containing A-JOC coded content (audio) object: data representing an object essence plus corresponding... |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 3.2 Symbols | For the purposes of the present document, the following symbols apply: X* complex conjugate of value X, if X is a scalar; and conjugate transpose if X is a vector round x towards plus infinity round x towards minus infinity (A|B) concatenation of matrix A with matrix B ETSI ETSI TS 103 190-2 V1.1.1 (2015-09) 20 |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 3.3 Abbreviations | For the purposes of the present document, the following abbreviations apply: ABR Average Bit Rate AC Audio Codec A-CPL Advanced CouPLing A-JCC Advanced Joint Channel Coding A-JOC Advanced Joint Object Coding ASF Audio Spectral Frontend ASPX Advanced Spectral Extension A-SPX Advanced SPectral eXtension tool BC Back Cent... |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 3.4 Conventions | Unless otherwise stated, the following convention regarding the notation is used: • Constants are indicated by upper-case italic, e.g. NOISE_FLOOR_OFFSET. • Tables are indicated as TABLE[idx]. • Functions are indicated as func(x). • Variables are indicated by italic, e.g. variable. • Vectors and vector components are i... |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 4 Decoding the AC-4 bitstream | |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 4.1 Introduction | The following clauses provide introduction, description and specification for several topics: • Clause 4.2 introduces object audio coding and describes differences to traditional channel audio coding • Clause 4.3 introduces the immersive audio experience • Clause 4.4 introduces the functionality of personalized audio i... |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 4.2 Channels and objects | Objects give content creators more control over how content is rendered to loudspeakers in consumer homes. In channel based audio coding, a set of tracks is implicitly assigned to specific loudspeakers by associating the set of tracks with a channel configuration. If the playback speaker configuration is different from... |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 4.3 Immersive Audio | Immersive Audio refers to the extension of traditional surround sound reproduction to include higher (spatial) resolution and full 3D audio rendering techniques (including ear-level, overhead and, potentially, floor speakers that are located below the listener) in order to reproduce more realistic and natural auditory ... |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 4.4 Personalized Audio | Personalization allows the content creator to deliver multiple stories for their content, providing consumer control over the broadcast experience. The present document specifies syntax and tools to support personalized audio experiences. The ability to deliver multiple program elements and combine these into presentat... |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 4.5 AC-4 Bitstream | |
9cc71134e4c63574779a8d3d5ef00858 | 103 190-2 | 4.5.1 Bitstream structure | This clause describes the top level structure of the bitstream, from TOC level down. An AC-4 bitstream is composed of a series of raw AC-4 frames, each of which can be encapsulated in the AC-4 sync frame transport format (see Annex C), or in another transport format. Figure 1 shows how the key structures are composed. ... |
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